Release 0.40.0v0.40.0

28 files changed, 387 insertions, 199 deletions

diff --git a/acme/setup.py b/acme/setup.py
index f9306e350..ee2d225e8 100644
--- a/acme/setup.py
+++ b/acme/setup.py
@@ -3,7 +3,7 @@ from setuptools import find_packages
 from setuptools.command.test import test as TestCommand
 import sys
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Please update tox.ini when modifying dependency version requirements
 install_requires = [
diff --git a/certbot-apache/setup.py b/certbot-apache/setup.py
index ad7b99862..9d22bacff 100644
--- a/certbot-apache/setup.py
+++ b/certbot-apache/setup.py
@@ -4,7 +4,7 @@ from setuptools.command.test import test as TestCommand
 import sys
 
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Remember to update local-oldest-requirements.txt when changing the minimum
 # acme/certbot version.
diff --git a/certbot-auto b/certbot-auto
index 68ced3260..5df7f5f30 100755
--- a/certbot-auto
+++ b/certbot-auto
@@ -31,7 +31,7 @@ if [ -z "$VENV_PATH" ]; then
 fi
 VENV_BIN="$VENV_PATH/bin"
 BOOTSTRAP_VERSION_PATH="$VENV_PATH/certbot-auto-bootstrap-version.txt"
-LE_AUTO_VERSION="0.39.0"
+LE_AUTO_VERSION="0.40.0"
 BASENAME=$(basename $0)
 USAGE="Usage: $BASENAME [OPTIONS]
 A self-updating wrapper script for the Certbot ACME client. When run, updates
@@ -256,20 +256,28 @@ DeprecationBootstrap() {
   fi
 }
 
-MIN_PYTHON_VERSION="2.7"
-MIN_PYVER=$(echo "$MIN_PYTHON_VERSION" | sed 's/\.//')
+MIN_PYTHON_2_VERSION="2.7"
+MIN_PYVER2=$(echo "$MIN_PYTHON_2_VERSION" | sed 's/\.//')
+MIN_PYTHON_3_VERSION="3.5"
+MIN_PYVER3=$(echo "$MIN_PYTHON_3_VERSION" | sed 's/\.//')
 # Sets LE_PYTHON to Python version string and PYVER to the first two
-# digits of the python version
+# digits of the python version.
+# MIN_PYVER and MIN_PYTHON_VERSION are also set by this function, and their
+# values depend on if we try to use Python 3 or Python 2.
 DeterminePythonVersion() {
   # Arguments: "NOCRASH" if we shouldn't crash if we don't find a good python
   #
   # If no Python is found, PYVER is set to 0.
   if [ "$USE_PYTHON_3" = 1 ]; then
+    MIN_PYVER=$MIN_PYVER3
+    MIN_PYTHON_VERSION=$MIN_PYTHON_3_VERSION
     for LE_PYTHON in "$LE_PYTHON" python3; do
       # Break (while keeping the LE_PYTHON value) if found.
       $EXISTS "$LE_PYTHON" > /dev/null && break
     done
   else
+    MIN_PYVER=$MIN_PYVER2
+    MIN_PYTHON_VERSION=$MIN_PYTHON_2_VERSION
     for LE_PYTHON in "$LE_PYTHON" python2.7 python27 python2 python; do
       # Break (while keeping the LE_PYTHON value) if found.
       $EXISTS "$LE_PYTHON" > /dev/null && break
@@ -285,7 +293,7 @@ DeterminePythonVersion() {
     fi
   fi
 
-  PYVER=`"$LE_PYTHON" -V 2>&1 | cut -d" " -f 2 | cut -d. -f1,2 | sed 's/\.//'`
+  PYVER=$("$LE_PYTHON" -V 2>&1 | cut -d" " -f 2 | cut -d. -f1,2 | sed 's/\.//')
   if [ "$PYVER" -lt "$MIN_PYVER" ]; then
     if [ "$1" != "NOCRASH" ]; then
       error "You have an ancient version of Python entombed in your operating system..."
@@ -368,7 +376,9 @@ BootstrapDebCommon() {
 
 # Sets TOOL to the name of the package manager
 # Sets appropriate values for YES_FLAG and QUIET_FLAG based on $ASSUME_YES and $QUIET_FLAG.
-# Enables EPEL if applicable and possible.
+# Note: this function is called both while selecting the bootstrap scripts and
+# during the actual bootstrap. Some things like prompting to user can be done in the latter
+# case, but not in the former one.
 InitializeRPMCommonBase() {
   if type dnf 2>/dev/null
   then
@@ -388,26 +398,6 @@ InitializeRPMCommonBase() {
   if [ "$QUIET" = 1 ]; then
     QUIET_FLAG='--quiet'
   fi
-
-  if ! $TOOL list *virtualenv >/dev/null 2>&1; then
-    echo "To use Certbot, packages from the EPEL repository need to be installed."
-    if ! $TOOL list epel-release >/dev/null 2>&1; then
-      error "Enable the EPEL repository and try running Certbot again."
-      exit 1
-    fi
-    if [ "$ASSUME_YES" = 1 ]; then
-      /bin/echo -n "Enabling the EPEL repository in 3 seconds..."
-      sleep 1s
-      /bin/echo -ne "\e[0K\rEnabling the EPEL repository in 2 seconds..."
-      sleep 1s
-      /bin/echo -e "\e[0K\rEnabling the EPEL repository in 1 second..."
-      sleep 1s
-    fi
-    if ! $TOOL install $YES_FLAG $QUIET_FLAG epel-release; then
-      error "Could not enable EPEL. Aborting bootstrap!"
-      exit 1
-    fi
-  fi
 }
 
 BootstrapRpmCommonBase() {
@@ -490,11 +480,86 @@ BootstrapRpmCommon() {
 
 # If new packages are installed by BootstrapRpmPython3 below, this version
 # number must be increased.
+BOOTSTRAP_RPM_PYTHON3_LEGACY_VERSION=1
+
+# Checks if rh-python36 can be installed.
+Python36SclIsAvailable() {
+  InitializeRPMCommonBase >/dev/null 2>&1;
+
+  if "${TOOL}" list rh-python36 >/dev/null 2>&1; then
+    return 0
+  fi
+  if "${TOOL}" list centos-release-scl >/dev/null 2>&1; then
+    return 0
+  fi
+  return 1
+}
+
+# Try to enable rh-python36 from SCL if it is necessary and possible.
+EnablePython36SCL() {
+  if "$EXISTS" python3.6 > /dev/null 2> /dev/null; then
+      return 0
+  fi
+  if ! scl --list 2>/dev/null | grep -q rh-python36; then
+      return 0
+  fi
+  set +e
+  . scl_source enable rh-python36
+  set -e
+}
+
+# This bootstrap concerns old RedHat-based distributions that do not ship by default
+# with Python 2.7, but only Python 2.6. We bootstrap them by enabling SCL and installing
+# Python 3.6. Some of these distributions are: CentOS/RHEL/OL/SL 6.
+BootstrapRpmPython3Legacy() {
+  # Tested with:
+  #   - CentOS 6
+
+  InitializeRPMCommonBase
+
+  if ! "${TOOL}" list rh-python36 >/dev/null 2>&1; then
+    echo "To use Certbot on this operating system, packages from the SCL repository need to be installed."
+    if ! "${TOOL}" list centos-release-scl >/dev/null 2>&1; then
+      error "Enable the SCL repository and try running Certbot again."
+      exit 1
+    fi
+    if [ "${ASSUME_YES}" = 1 ]; then
+      /bin/echo -n "Enabling the SCL repository in 3 seconds... (Press Ctrl-C to cancel)"
+      sleep 1s
+      /bin/echo -ne "\e[0K\rEnabling the SCL repository in 2 seconds... (Press Ctrl-C to cancel)"
+      sleep 1s
+      /bin/echo -e "\e[0K\rEnabling the SCL repository in 1 second... (Press Ctrl-C to cancel)"
+      sleep 1s
+    fi
+    if ! "${TOOL}" install "${YES_FLAG}" "${QUIET_FLAG}" centos-release-scl; then
+      error "Could not enable SCL. Aborting bootstrap!"
+      exit 1
+    fi
+  fi
+
+  # CentOS 6 must use rh-python36 from SCL
+  if "${TOOL}" list rh-python36 >/dev/null 2>&1; then
+    python_pkgs="rh-python36-python
+      rh-python36-python-virtualenv
+      rh-python36-python-devel
+    "
+  else
+    error "No supported Python package available to install. Aborting bootstrap!"
+    exit 1
+  fi
+
+  BootstrapRpmCommonBase "${python_pkgs}"
+
+  # Enable SCL rh-python36 after bootstrapping.
+  EnablePython36SCL
+}
+
+# If new packages are installed by BootstrapRpmPython3 below, this version
+# number must be increased.
 BOOTSTRAP_RPM_PYTHON3_VERSION=1
 
 BootstrapRpmPython3() {
   # Tested with:
-  #   - CentOS 6
   #   - Fedora 29
 
   InitializeRPMCommonBase
@@ -505,12 +570,6 @@ BootstrapRpmPython3() {
       python3-virtualenv
       python3-devel
     "
-  # EPEL uses python34
-  elif $TOOL list python34 >/dev/null 2>&1; then
-    python_pkgs="python34
-      python34-devel
-      python34-tools
-    "
   else
     error "No supported Python package available to install. Aborting bootstrap!"
     exit 1
@@ -769,31 +828,50 @@ elif [ -f /etc/redhat-release ]; then
      RPM_DIST_VERSION=0
   fi
 
-  # Starting to Fedora 29, python2 is on a deprecation path. Let's move to python3 then.
-  # RHEL 8 also uses python3 by default.
-  if [ "$RPM_DIST_NAME" = "fedora" -a "$RPM_DIST_VERSION" -ge 29 -o "$PYVER" -eq 26 ]; then
-    RPM_USE_PYTHON_3=1
-  elif [ "$RPM_DIST_NAME" = "rhel" -a "$RPM_DIST_VERSION" -ge 8 ]; then
-    RPM_USE_PYTHON_3=1
-  elif [ "$RPM_DIST_NAME" = "centos" -a "$RPM_DIST_VERSION" -ge 8 ]; then
-    RPM_USE_PYTHON_3=1
-  else
-    RPM_USE_PYTHON_3=0
-  fi
+  # Handle legacy RPM distributions
+  if [ "$PYVER" -eq 26 ]; then
+    # Check if an automated bootstrap can be achieved on this system.
+    if ! Python36SclIsAvailable; then
+      INTERACTIVE_BOOTSTRAP=1
+    fi
 
-  if [ "$RPM_USE_PYTHON_3" = 1 ]; then
     Bootstrap() {
-      BootstrapMessage "RedHat-based OSes that will use Python3"
-      BootstrapRpmPython3
+      BootstrapMessage "Legacy RedHat-based OSes that will use Python3"
+      BootstrapRpmPython3Legacy
     }
     USE_PYTHON_3=1
-    BOOTSTRAP_VERSION="BootstrapRpmPython3 $BOOTSTRAP_RPM_PYTHON3_VERSION"
+    BOOTSTRAP_VERSION="BootstrapRpmPython3Legacy $BOOTSTRAP_RPM_PYTHON3_LEGACY_VERSION"
+
+    # Try now to enable SCL rh-python36 for systems already bootstrapped
+    # NB: EnablePython36SCL has been defined along with BootstrapRpmPython3Legacy in certbot-auto
+    EnablePython36SCL
   else
-    Bootstrap() {
-      BootstrapMessage "RedHat-based OSes"
-      BootstrapRpmCommon
-    }
-    BOOTSTRAP_VERSION="BootstrapRpmCommon $BOOTSTRAP_RPM_COMMON_VERSION"
+    # Starting to Fedora 29, python2 is on a deprecation path. Let's move to python3 then.
+    # RHEL 8 also uses python3 by default.
+    if [ "$RPM_DIST_NAME" = "fedora" -a "$RPM_DIST_VERSION" -ge 29 ]; then
+      RPM_USE_PYTHON_3=1
+    elif [ "$RPM_DIST_NAME" = "rhel" -a "$RPM_DIST_VERSION" -ge 8 ]; then
+      RPM_USE_PYTHON_3=1
+    elif [ "$RPM_DIST_NAME" = "centos" -a "$RPM_DIST_VERSION" -ge 8 ]; then
+      RPM_USE_PYTHON_3=1
+    else
+      RPM_USE_PYTHON_3=0
+    fi
+
+    if [ "$RPM_USE_PYTHON_3" = 1 ]; then
+      Bootstrap() {
+        BootstrapMessage "RedHat-based OSes that will use Python3"
+        BootstrapRpmPython3
+      }
+      USE_PYTHON_3=1
+      BOOTSTRAP_VERSION="BootstrapRpmPython3 $BOOTSTRAP_RPM_PYTHON3_VERSION"
+    else
+      Bootstrap() {
+        BootstrapMessage "RedHat-based OSes"
+        BootstrapRpmCommon
+      }
+      BOOTSTRAP_VERSION="BootstrapRpmCommon $BOOTSTRAP_RPM_COMMON_VERSION"
+    fi
   fi
 
   LE_PYTHON="$prev_le_python"
@@ -1078,8 +1156,15 @@ if [ "$1" = "--le-auto-phase2" ]; then
     # If the selected Bootstrap function isn't a noop and it differs from the
     # previously used version
     if [ -n "$BOOTSTRAP_VERSION" -a "$BOOTSTRAP_VERSION" != "$PREV_BOOTSTRAP_VERSION" ]; then
-      # if non-interactive mode or stdin and stdout are connected to a terminal
-      if [ \( "$NONINTERACTIVE" = 1 \) -o \( \( -t 0 \) -a \( -t 1 \) \) ]; then
+      # Check if we can rebootstrap without manual user intervention: this requires that
+      # certbot-auto is in non-interactive mode AND selected bootstrap does not claim to
+      # require a manual user intervention.
+      if [ "$NONINTERACTIVE" = 1 -a "$INTERACTIVE_BOOTSTRAP" != 1 ]; then
+        CAN_REBOOTSTRAP=1
+      fi
+      # Check if rebootstrap can be done non-interactively and current shell is non-interactive
+      # (true if stdin and stdout are not attached to a terminal).
+      if [ \( "$CAN_REBOOTSTRAP" = 1 \) -o \( \( -t 0 \) -a \( -t 1 \) \) ]; then
         if [ -d "$VENV_PATH" ]; then
           rm -rf "$VENV_PATH"
         fi
@@ -1090,12 +1175,21 @@ if [ "$1" = "--le-auto-phase2" ]; then
           ln -s "$VENV_PATH" "$OLD_VENV_PATH"
         fi
         RerunWithArgs "$@"
+      # Otherwise bootstrap needs to be done manually by the user.
       else
-        error "Skipping upgrade because new OS dependencies may need to be installed."
-        error
-        error "To upgrade to a newer version, please run this script again manually so you can"
-        error "approve changes or with --non-interactive on the command line to automatically"
-        error "install any required packages."
+        # If it is because bootstrapping is interactive, --non-interactive will be of no use.
+        if [ "$INTERACTIVE_BOOTSTRAP" = 1 ]; then
+          error "Skipping upgrade because new OS dependencies may need to be installed."
+          error "This requires manual user intervention: please run this script again manually."
+        # If this is because of the environment (eg. non interactive shell without
+        # --non-interactive flag set), help the user in that direction.
+        else
+          error "Skipping upgrade because new OS dependencies may need to be installed."
+          error
+          error "To upgrade to a newer version, please run this script again manually so you can"
+          error "approve changes or with --non-interactive on the command line to automatically"
+          error "install any required packages."
+        fi
         # Set INSTALLED_VERSION to be the same so we don't update the venv
         INSTALLED_VERSION="$LE_AUTO_VERSION"
         # Continue to use OLD_VENV_PATH if the new venv doesn't exist
@@ -1338,18 +1432,18 @@ letsencrypt==0.7.0 \
     --hash=sha256:105a5fb107e45bcd0722eb89696986dcf5f08a86a321d6aef25a0c7c63375ade \
     --hash=sha256:c36e532c486a7e92155ee09da54b436a3c420813ec1c590b98f635d924720de9
 
-certbot==0.39.0 \
-    --hash=sha256:f1a70651a6c5137a448f4a8db17b09af619f80a077326caae6b74278bf1db488 \
-    --hash=sha256:885cee1c4d05888af86b626cbbfc29d3c6c842ef4fe8f4a486994cef9daddfe0
-acme==0.39.0 \
-    --hash=sha256:4f8be913df289b981852042719469cc367a7e436256f232c799d0bd1521db710 \
-    --hash=sha256:a2fcb75d16de6804f4b4d773a457ee2f6434ebaf8fd1aa60862a91d4e8f73608
-certbot-apache==0.39.0 \
-    --hash=sha256:c7a8630a85b753a52ca0b8c19e24b8f85ac4ba028292a95745e250c2e72faab9 \
-    --hash=sha256:4651a0212c9ebc3087281dad92ad3cb355bb2730f432d0180a8d23325d11825a
-certbot-nginx==0.39.0 \
-    --hash=sha256:76e5862ad5cc0fbc099df3502987c101c60dee1c188a579eac990edee7a910df \
-    --hash=sha256:ceac88df52d3b27d14c3052b9e90ada327d7e14ecd6e4af7519918182d6138b4
+certbot==0.40.0 \
+    --hash=sha256:b9ff74c4f3d3e06d9c467465f97bcbb07b0f4d778d3c4232ab91583d933dba61 \
+    --hash=sha256:cff166597b3c714c3e7e60b2bcd6089135b375cadca04cf36abd15bfdb22be40
+acme==0.40.0 \
+    --hash=sha256:1b026b07a2099e50dac11cbdb834925f1d9b5691e349b52e9d397a12f3dc4eac \
+    --hash=sha256:f29c1185d1e33919bad6c1f3fece168ee191d96d47f5997117561dc74a454221
+certbot-apache==0.40.0 \
+    --hash=sha256:f1c034a05fbd6cc6fde9494f493a8a6ed0e02e7652e51af16342082bc17387e4 \
+    --hash=sha256:43c3d7628ca6630467c4f57dd30423f031c1c7cbca46f7500293172d0fe3581e
+certbot-nginx==0.40.0 \
+    --hash=sha256:55cd3c90e2851069b536859050374fe2fcfa22c3e862cc0e1811fbce9e52dccc \
+    --hash=sha256:3df8cec22910f2d41ccb4494661ff65f98c52dd441864a53a318b32979256881
 
 UNLIKELY_EOF
     # -------------------------------------------------------------------------
diff --git a/certbot-compatibility-test/setup.py b/certbot-compatibility-test/setup.py
index 1d648db17..e7f4880f1 100644
--- a/certbot-compatibility-test/setup.py
+++ b/certbot-compatibility-test/setup.py
@@ -4,7 +4,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 install_requires = [
     'certbot',
diff --git a/certbot-dns-cloudflare/setup.py b/certbot-dns-cloudflare/setup.py
index 5ad8f1568..1855428d2 100644
--- a/certbot-dns-cloudflare/setup.py
+++ b/certbot-dns-cloudflare/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Remember to update local-oldest-requirements.txt when changing the minimum
 # acme/certbot version.
diff --git a/certbot-dns-cloudxns/setup.py b/certbot-dns-cloudxns/setup.py
index 0dd5bc397..e642d406a 100644
--- a/certbot-dns-cloudxns/setup.py
+++ b/certbot-dns-cloudxns/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Remember to update local-oldest-requirements.txt when changing the minimum
 # acme/certbot version.
diff --git a/certbot-dns-digitalocean/setup.py b/certbot-dns-digitalocean/setup.py
index 2d3139a2f..c6fbc9a0c 100644
--- a/certbot-dns-digitalocean/setup.py
+++ b/certbot-dns-digitalocean/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Remember to update local-oldest-requirements.txt when changing the minimum
 # acme/certbot version.
diff --git a/certbot-dns-dnsimple/setup.py b/certbot-dns-dnsimple/setup.py
index 6925946ec..a62afa912 100644
--- a/certbot-dns-dnsimple/setup.py
+++ b/certbot-dns-dnsimple/setup.py
@@ -3,7 +3,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Remember to update local-oldest-requirements.txt when changing the minimum
 # acme/certbot version.
diff --git a/certbot-dns-dnsmadeeasy/setup.py b/certbot-dns-dnsmadeeasy/setup.py
index d31e52686..cf35a0427 100644
--- a/certbot-dns-dnsmadeeasy/setup.py
+++ b/certbot-dns-dnsmadeeasy/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Remember to update local-oldest-requirements.txt when changing the minimum
 # acme/certbot version.
diff --git a/certbot-dns-gehirn/setup.py b/certbot-dns-gehirn/setup.py
index f6b944625..06399cace 100644
--- a/certbot-dns-gehirn/setup.py
+++ b/certbot-dns-gehirn/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Please update tox.ini when modifying dependency version requirements
 install_requires = [
diff --git a/certbot-dns-google/setup.py b/certbot-dns-google/setup.py
index 6bf12ddbf..37903034d 100644
--- a/certbot-dns-google/setup.py
+++ b/certbot-dns-google/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Remember to update local-oldest-requirements.txt when changing the minimum
 # acme/certbot version.
diff --git a/certbot-dns-linode/setup.py b/certbot-dns-linode/setup.py
index ce4647514..11c0d577f 100644
--- a/certbot-dns-linode/setup.py
+++ b/certbot-dns-linode/setup.py
@@ -1,7 +1,7 @@
 from setuptools import setup
 from setuptools import find_packages
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Please update tox.ini when modifying dependency version requirements
 install_requires = [
diff --git a/certbot-dns-luadns/setup.py b/certbot-dns-luadns/setup.py
index f260c68db..2bf62d4a0 100644
--- a/certbot-dns-luadns/setup.py
+++ b/certbot-dns-luadns/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Remember to update local-oldest-requirements.txt when changing the minimum
 # acme/certbot version.
diff --git a/certbot-dns-nsone/setup.py b/certbot-dns-nsone/setup.py
index c6a5ca443..7ed20ad8a 100644
--- a/certbot-dns-nsone/setup.py
+++ b/certbot-dns-nsone/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Remember to update local-oldest-requirements.txt when changing the minimum
 # acme/certbot version.
diff --git a/certbot-dns-ovh/setup.py b/certbot-dns-ovh/setup.py
index 48b8cee4e..849cbc548 100644
--- a/certbot-dns-ovh/setup.py
+++ b/certbot-dns-ovh/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Remember to update local-oldest-requirements.txt when changing the minimum
 # acme/certbot version.
diff --git a/certbot-dns-rfc2136/setup.py b/certbot-dns-rfc2136/setup.py
index 6fc69ebc0..d03c7cc0c 100644
--- a/certbot-dns-rfc2136/setup.py
+++ b/certbot-dns-rfc2136/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Remember to update local-oldest-requirements.txt when changing the minimum
 # acme/certbot version.
diff --git a/certbot-dns-route53/setup.py b/certbot-dns-route53/setup.py
index 857e07965..0f097f977 100644
--- a/certbot-dns-route53/setup.py
+++ b/certbot-dns-route53/setup.py
@@ -1,7 +1,7 @@
 from setuptools import setup
 from setuptools import find_packages
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Remember to update local-oldest-requirements.txt when changing the minimum
 # acme/certbot version.
diff --git a/certbot-dns-sakuracloud/setup.py b/certbot-dns-sakuracloud/setup.py
index c153c681f..9d2b0f901 100644
--- a/certbot-dns-sakuracloud/setup.py
+++ b/certbot-dns-sakuracloud/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Please update tox.ini when modifying dependency version requirements
 install_requires = [
diff --git a/certbot-nginx/setup.py b/certbot-nginx/setup.py
index 8fe300193..b53e16659 100644
--- a/certbot-nginx/setup.py
+++ b/certbot-nginx/setup.py
@@ -4,7 +4,7 @@ from setuptools.command.test import test as TestCommand
 import sys
 
 
-version = '0.40.0.dev0'
+version = '0.40.0'
 
 # Remember to update local-oldest-requirements.txt when changing the minimum
 # acme/certbot version.
diff --git a/certbot/__init__.py b/certbot/__init__.py
index 27b8684e1..ca79e552f 100644
--- a/certbot/__init__.py
+++ b/certbot/__init__.py
@@ -1,4 +1,4 @@
 """Certbot client."""
 
 # version number like 1.2.3a0, must have at least 2 parts, like 1.2
-__version__ = '0.40.0.dev0'
+__version__ = '0.40.0'
diff --git a/docs/cli-help.txt b/docs/cli-help.txt
index 134a6879a..37539a24b 100644
--- a/docs/cli-help.txt
+++ b/docs/cli-help.txt
@@ -113,7 +113,7 @@ optional arguments:
                         case, and to know when to deprecate support for past
                         Python versions and flags. If you wish to hide this
                         information from the Let's Encrypt server, set this to
-                        "". (default: CertbotACMEClient/0.39.0
+                        "". (default: CertbotACMEClient/0.40.0
                         (certbot(-auto); OS_NAME OS_VERSION) Authenticator/XXX
                         Installer/YYY (SUBCOMMAND; flags: FLAGS)
                         Py/major.minor.patchlevel). The flags encoded in the
diff --git a/letsencrypt-auto b/letsencrypt-auto
index 68ced3260..5df7f5f30 100755
--- a/letsencrypt-auto
+++ b/letsencrypt-auto
@@ -31,7 +31,7 @@ if [ -z "$VENV_PATH" ]; then
 fi
 VENV_BIN="$VENV_PATH/bin"
 BOOTSTRAP_VERSION_PATH="$VENV_PATH/certbot-auto-bootstrap-version.txt"
-LE_AUTO_VERSION="0.39.0"
+LE_AUTO_VERSION="0.40.0"
 BASENAME=$(basename $0)
 USAGE="Usage: $BASENAME [OPTIONS]
 A self-updating wrapper script for the Certbot ACME client. When run, updates
@@ -256,20 +256,28 @@ DeprecationBootstrap() {
   fi
 }
 
-MIN_PYTHON_VERSION="2.7"
-MIN_PYVER=$(echo "$MIN_PYTHON_VERSION" | sed 's/\.//')
+MIN_PYTHON_2_VERSION="2.7"
+MIN_PYVER2=$(echo "$MIN_PYTHON_2_VERSION" | sed 's/\.//')
+MIN_PYTHON_3_VERSION="3.5"
+MIN_PYVER3=$(echo "$MIN_PYTHON_3_VERSION" | sed 's/\.//')
 # Sets LE_PYTHON to Python version string and PYVER to the first two
-# digits of the python version
+# digits of the python version.
+# MIN_PYVER and MIN_PYTHON_VERSION are also set by this function, and their
+# values depend on if we try to use Python 3 or Python 2.
 DeterminePythonVersion() {
   # Arguments: "NOCRASH" if we shouldn't crash if we don't find a good python
   #
   # If no Python is found, PYVER is set to 0.
   if [ "$USE_PYTHON_3" = 1 ]; then
+    MIN_PYVER=$MIN_PYVER3
+    MIN_PYTHON_VERSION=$MIN_PYTHON_3_VERSION
     for LE_PYTHON in "$LE_PYTHON" python3; do
       # Break (while keeping the LE_PYTHON value) if found.
       $EXISTS "$LE_PYTHON" > /dev/null && break
     done
   else
+    MIN_PYVER=$MIN_PYVER2
+    MIN_PYTHON_VERSION=$MIN_PYTHON_2_VERSION
     for LE_PYTHON in "$LE_PYTHON" python2.7 python27 python2 python; do
       # Break (while keeping the LE_PYTHON value) if found.
       $EXISTS "$LE_PYTHON" > /dev/null && break
@@ -285,7 +293,7 @@ DeterminePythonVersion() {
     fi
   fi
 
-  PYVER=`"$LE_PYTHON" -V 2>&1 | cut -d" " -f 2 | cut -d. -f1,2 | sed 's/\.//'`
+  PYVER=$("$LE_PYTHON" -V 2>&1 | cut -d" " -f 2 | cut -d. -f1,2 | sed 's/\.//')
   if [ "$PYVER" -lt "$MIN_PYVER" ]; then
     if [ "$1" != "NOCRASH" ]; then
       error "You have an ancient version of Python entombed in your operating system..."
@@ -368,7 +376,9 @@ BootstrapDebCommon() {
 
 # Sets TOOL to the name of the package manager
 # Sets appropriate values for YES_FLAG and QUIET_FLAG based on $ASSUME_YES and $QUIET_FLAG.
-# Enables EPEL if applicable and possible.
+# Note: this function is called both while selecting the bootstrap scripts and
+# during the actual bootstrap. Some things like prompting to user can be done in the latter
+# case, but not in the former one.
 InitializeRPMCommonBase() {
   if type dnf 2>/dev/null
   then
@@ -388,26 +398,6 @@ InitializeRPMCommonBase() {
   if [ "$QUIET" = 1 ]; then
     QUIET_FLAG='--quiet'
   fi
-
-  if ! $TOOL list *virtualenv >/dev/null 2>&1; then
-    echo "To use Certbot, packages from the EPEL repository need to be installed."
-    if ! $TOOL list epel-release >/dev/null 2>&1; then
-      error "Enable the EPEL repository and try running Certbot again."
-      exit 1
-    fi
-    if [ "$ASSUME_YES" = 1 ]; then
-      /bin/echo -n "Enabling the EPEL repository in 3 seconds..."
-      sleep 1s
-      /bin/echo -ne "\e[0K\rEnabling the EPEL repository in 2 seconds..."
-      sleep 1s
-      /bin/echo -e "\e[0K\rEnabling the EPEL repository in 1 second..."
-      sleep 1s
-    fi
-    if ! $TOOL install $YES_FLAG $QUIET_FLAG epel-release; then
-      error "Could not enable EPEL. Aborting bootstrap!"
-      exit 1
-    fi
-  fi
 }
 
 BootstrapRpmCommonBase() {
@@ -490,11 +480,86 @@ BootstrapRpmCommon() {
 
 # If new packages are installed by BootstrapRpmPython3 below, this version
 # number must be increased.
+BOOTSTRAP_RPM_PYTHON3_LEGACY_VERSION=1
+
+# Checks if rh-python36 can be installed.
+Python36SclIsAvailable() {
+  InitializeRPMCommonBase >/dev/null 2>&1;
+
+  if "${TOOL}" list rh-python36 >/dev/null 2>&1; then
+    return 0
+  fi
+  if "${TOOL}" list centos-release-scl >/dev/null 2>&1; then
+    return 0
+  fi
+  return 1
+}
+
+# Try to enable rh-python36 from SCL if it is necessary and possible.
+EnablePython36SCL() {
+  if "$EXISTS" python3.6 > /dev/null 2> /dev/null; then
+      return 0
+  fi
+  if ! scl --list 2>/dev/null | grep -q rh-python36; then
+      return 0
+  fi
+  set +e
+  . scl_source enable rh-python36
+  set -e
+}
+
+# This bootstrap concerns old RedHat-based distributions that do not ship by default
+# with Python 2.7, but only Python 2.6. We bootstrap them by enabling SCL and installing
+# Python 3.6. Some of these distributions are: CentOS/RHEL/OL/SL 6.
+BootstrapRpmPython3Legacy() {
+  # Tested with:
+  #   - CentOS 6
+
+  InitializeRPMCommonBase
+
+  if ! "${TOOL}" list rh-python36 >/dev/null 2>&1; then
+    echo "To use Certbot on this operating system, packages from the SCL repository need to be installed."
+    if ! "${TOOL}" list centos-release-scl >/dev/null 2>&1; then
+      error "Enable the SCL repository and try running Certbot again."
+      exit 1
+    fi
+    if [ "${ASSUME_YES}" = 1 ]; then
+      /bin/echo -n "Enabling the SCL repository in 3 seconds... (Press Ctrl-C to cancel)"
+      sleep 1s
+      /bin/echo -ne "\e[0K\rEnabling the SCL repository in 2 seconds... (Press Ctrl-C to cancel)"
+      sleep 1s
+      /bin/echo -e "\e[0K\rEnabling the SCL repository in 1 second... (Press Ctrl-C to cancel)"
+      sleep 1s
+    fi
+    if ! "${TOOL}" install "${YES_FLAG}" "${QUIET_FLAG}" centos-release-scl; then
+      error "Could not enable SCL. Aborting bootstrap!"
+      exit 1
+    fi
+  fi
+
+  # CentOS 6 must use rh-python36 from SCL
+  if "${TOOL}" list rh-python36 >/dev/null 2>&1; then
+    python_pkgs="rh-python36-python
+      rh-python36-python-virtualenv
+      rh-python36-python-devel
+    "
+  else
+    error "No supported Python package available to install. Aborting bootstrap!"
+    exit 1
+  fi
+
+  BootstrapRpmCommonBase "${python_pkgs}"
+
+  # Enable SCL rh-python36 after bootstrapping.
+  EnablePython36SCL
+}
+
+# If new packages are installed by BootstrapRpmPython3 below, this version
+# number must be increased.
 BOOTSTRAP_RPM_PYTHON3_VERSION=1
 
 BootstrapRpmPython3() {
   # Tested with:
-  #   - CentOS 6
   #   - Fedora 29
 
   InitializeRPMCommonBase
@@ -505,12 +570,6 @@ BootstrapRpmPython3() {
       python3-virtualenv
       python3-devel
     "
-  # EPEL uses python34
-  elif $TOOL list python34 >/dev/null 2>&1; then
-    python_pkgs="python34
-      python34-devel
-      python34-tools
-    "
   else
     error "No supported Python package available to install. Aborting bootstrap!"
     exit 1
@@ -769,31 +828,50 @@ elif [ -f /etc/redhat-release ]; then
      RPM_DIST_VERSION=0
   fi
 
-  # Starting to Fedora 29, python2 is on a deprecation path. Let's move to python3 then.
-  # RHEL 8 also uses python3 by default.
-  if [ "$RPM_DIST_NAME" = "fedora" -a "$RPM_DIST_VERSION" -ge 29 -o "$PYVER" -eq 26 ]; then
-    RPM_USE_PYTHON_3=1
-  elif [ "$RPM_DIST_NAME" = "rhel" -a "$RPM_DIST_VERSION" -ge 8 ]; then
-    RPM_USE_PYTHON_3=1
-  elif [ "$RPM_DIST_NAME" = "centos" -a "$RPM_DIST_VERSION" -ge 8 ]; then
-    RPM_USE_PYTHON_3=1
-  else
-    RPM_USE_PYTHON_3=0
-  fi
+  # Handle legacy RPM distributions
+  if [ "$PYVER" -eq 26 ]; then
+    # Check if an automated bootstrap can be achieved on this system.
+    if ! Python36SclIsAvailable; then
+      INTERACTIVE_BOOTSTRAP=1
+    fi
 
-  if [ "$RPM_USE_PYTHON_3" = 1 ]; then
     Bootstrap() {
-      BootstrapMessage "RedHat-based OSes that will use Python3"
-      BootstrapRpmPython3
+      BootstrapMessage "Legacy RedHat-based OSes that will use Python3"
+      BootstrapRpmPython3Legacy
     }
     USE_PYTHON_3=1
-    BOOTSTRAP_VERSION="BootstrapRpmPython3 $BOOTSTRAP_RPM_PYTHON3_VERSION"
+    BOOTSTRAP_VERSION="BootstrapRpmPython3Legacy $BOOTSTRAP_RPM_PYTHON3_LEGACY_VERSION"
+
+    # Try now to enable SCL rh-python36 for systems already bootstrapped
+    # NB: EnablePython36SCL has been defined along with BootstrapRpmPython3Legacy in certbot-auto
+    EnablePython36SCL
   else
-    Bootstrap() {
-      BootstrapMessage "RedHat-based OSes"
-      BootstrapRpmCommon
-    }
-    BOOTSTRAP_VERSION="BootstrapRpmCommon $BOOTSTRAP_RPM_COMMON_VERSION"
+    # Starting to Fedora 29, python2 is on a deprecation path. Let's move to python3 then.
+    # RHEL 8 also uses python3 by default.
+    if [ "$RPM_DIST_NAME" = "fedora" -a "$RPM_DIST_VERSION" -ge 29 ]; then
+      RPM_USE_PYTHON_3=1
+    elif [ "$RPM_DIST_NAME" = "rhel" -a "$RPM_DIST_VERSION" -ge 8 ]; then
+      RPM_USE_PYTHON_3=1
+    elif [ "$RPM_DIST_NAME" = "centos" -a "$RPM_DIST_VERSION" -ge 8 ]; then
+      RPM_USE_PYTHON_3=1
+    else
+      RPM_USE_PYTHON_3=0
+    fi
+
+    if [ "$RPM_USE_PYTHON_3" = 1 ]; then
+      Bootstrap() {
+        BootstrapMessage "RedHat-based OSes that will use Python3"
+        BootstrapRpmPython3
+      }
+      USE_PYTHON_3=1
+      BOOTSTRAP_VERSION="BootstrapRpmPython3 $BOOTSTRAP_RPM_PYTHON3_VERSION"
+    else
+      Bootstrap() {
+        BootstrapMessage "RedHat-based OSes"
+        BootstrapRpmCommon
+      }
+      BOOTSTRAP_VERSION="BootstrapRpmCommon $BOOTSTRAP_RPM_COMMON_VERSION"
+    fi
   fi
 
   LE_PYTHON="$prev_le_python"
@@ -1078,8 +1156,15 @@ if [ "$1" = "--le-auto-phase2" ]; then
     # If the selected Bootstrap function isn't a noop and it differs from the
     # previously used version
     if [ -n "$BOOTSTRAP_VERSION" -a "$BOOTSTRAP_VERSION" != "$PREV_BOOTSTRAP_VERSION" ]; then
-      # if non-interactive mode or stdin and stdout are connected to a terminal
-      if [ \( "$NONINTERACTIVE" = 1 \) -o \( \( -t 0 \) -a \( -t 1 \) \) ]; then
+      # Check if we can rebootstrap without manual user intervention: this requires that
+      # certbot-auto is in non-interactive mode AND selected bootstrap does not claim to
+      # require a manual user intervention.
+      if [ "$NONINTERACTIVE" = 1 -a "$INTERACTIVE_BOOTSTRAP" != 1 ]; then
+        CAN_REBOOTSTRAP=1
+      fi
+      # Check if rebootstrap can be done non-interactively and current shell is non-interactive
+      # (true if stdin and stdout are not attached to a terminal).
+      if [ \( "$CAN_REBOOTSTRAP" = 1 \) -o \( \( -t 0 \) -a \( -t 1 \) \) ]; then
         if [ -d "$VENV_PATH" ]; then
           rm -rf "$VENV_PATH"
         fi
@@ -1090,12 +1175,21 @@ if [ "$1" = "--le-auto-phase2" ]; then
           ln -s "$VENV_PATH" "$OLD_VENV_PATH"
         fi
         RerunWithArgs "$@"
+      # Otherwise bootstrap needs to be done manually by the user.
       else
-        error "Skipping upgrade because new OS dependencies may need to be installed."
-        error
-        error "To upgrade to a newer version, please run this script again manually so you can"
-        error "approve changes or with --non-interactive on the command line to automatically"
-        error "install any required packages."
+        # If it is because bootstrapping is interactive, --non-interactive will be of no use.
+        if [ "$INTERACTIVE_BOOTSTRAP" = 1 ]; then
+          error "Skipping upgrade because new OS dependencies may need to be installed."
+          error "This requires manual user intervention: please run this script again manually."
+        # If this is because of the environment (eg. non interactive shell without
+        # --non-interactive flag set), help the user in that direction.
+        else
+          error "Skipping upgrade because new OS dependencies may need to be installed."
+          error
+          error "To upgrade to a newer version, please run this script again manually so you can"
+          error "approve changes or with --non-interactive on the command line to automatically"
+          error "install any required packages."
+        fi
         # Set INSTALLED_VERSION to be the same so we don't update the venv
         INSTALLED_VERSION="$LE_AUTO_VERSION"
         # Continue to use OLD_VENV_PATH if the new venv doesn't exist
@@ -1338,18 +1432,18 @@ letsencrypt==0.7.0 \
     --hash=sha256:105a5fb107e45bcd0722eb89696986dcf5f08a86a321d6aef25a0c7c63375ade \
     --hash=sha256:c36e532c486a7e92155ee09da54b436a3c420813ec1c590b98f635d924720de9
 
-certbot==0.39.0 \
-    --hash=sha256:f1a70651a6c5137a448f4a8db17b09af619f80a077326caae6b74278bf1db488 \
-    --hash=sha256:885cee1c4d05888af86b626cbbfc29d3c6c842ef4fe8f4a486994cef9daddfe0
-acme==0.39.0 \
-    --hash=sha256:4f8be913df289b981852042719469cc367a7e436256f232c799d0bd1521db710 \
-    --hash=sha256:a2fcb75d16de6804f4b4d773a457ee2f6434ebaf8fd1aa60862a91d4e8f73608
-certbot-apache==0.39.0 \
-    --hash=sha256:c7a8630a85b753a52ca0b8c19e24b8f85ac4ba028292a95745e250c2e72faab9 \
-    --hash=sha256:4651a0212c9ebc3087281dad92ad3cb355bb2730f432d0180a8d23325d11825a
-certbot-nginx==0.39.0 \
-    --hash=sha256:76e5862ad5cc0fbc099df3502987c101c60dee1c188a579eac990edee7a910df \
-    --hash=sha256:ceac88df52d3b27d14c3052b9e90ada327d7e14ecd6e4af7519918182d6138b4
+certbot==0.40.0 \
+    --hash=sha256:b9ff74c4f3d3e06d9c467465f97bcbb07b0f4d778d3c4232ab91583d933dba61 \
+    --hash=sha256:cff166597b3c714c3e7e60b2bcd6089135b375cadca04cf36abd15bfdb22be40
+acme==0.40.0 \
+    --hash=sha256:1b026b07a2099e50dac11cbdb834925f1d9b5691e349b52e9d397a12f3dc4eac \
+    --hash=sha256:f29c1185d1e33919bad6c1f3fece168ee191d96d47f5997117561dc74a454221
+certbot-apache==0.40.0 \
+    --hash=sha256:f1c034a05fbd6cc6fde9494f493a8a6ed0e02e7652e51af16342082bc17387e4 \
+    --hash=sha256:43c3d7628ca6630467c4f57dd30423f031c1c7cbca46f7500293172d0fe3581e
+certbot-nginx==0.40.0 \
+    --hash=sha256:55cd3c90e2851069b536859050374fe2fcfa22c3e862cc0e1811fbce9e52dccc \
+    --hash=sha256:3df8cec22910f2d41ccb4494661ff65f98c52dd441864a53a318b32979256881
 
 UNLIKELY_EOF
     # -------------------------------------------------------------------------
diff --git a/letsencrypt-auto-source/certbot-auto.asc b/letsencrypt-auto-source/certbot-auto.asc
index f25f27cdf..3bdb8a93c 100644
--- a/letsencrypt-auto-source/certbot-auto.asc
+++ b/letsencrypt-auto-source/certbot-auto.asc
@@ -1,11 +1,11 @@
 -----BEGIN PGP SIGNATURE-----
 
-iQEzBAABCAAdFiEEos+1H6J1pyhiNOeyTRfJlc2XdfIFAl2TsPMACgkQTRfJlc2X
-dfJHUAf+NcnvHzowhLr1rkR11CSKMCMgwUee7Nm0QHnVPf09+Dd9mvuaRptuua1D
-Qvtcb3F4OQ6/3khy3fzGXIcEe9kuI2+boe+ZA0dfmmzo4ELzpWUadXkuonYybZFE
-JAaICgLLHOkiRL8J8ZTmXZI4tbFSsxTLMNOwoMZ6oGgp2plj2rm85L4Z+vUlfaTf
-wcs/glbBtbYfW3WWapMsMWwgrE62Q/OOhBjbkPCywFRQDwwaXz6QPrvi+k6gLCqs
-Okvg5bY2hP70tU1i9wxp2DAfF/P/5i2hVSWktRdMolUTTTeczLW81allmmDRJcAi
-4xrj6wYhN7olMZrTpakXb7zRR9/MGQ==
-=Ag2y
+iQEzBAABCAAdFiEEos+1H6J1pyhiNOeyTRfJlc2XdfIFAl3B4KcACgkQTRfJlc2X
+dfJKHAf+PUViUdwbaXUMNfDRo7g6v44RA0RIj+SG3cjLsX2E/A2G70KndfUC/9KS
+cgYpFZ3h/2y3fLLsYgDIOPRhAKLgrk+LFKrtDsUbOLF7K3eS70KQmDxYFXNzw0jc
+34zhc9BKsKrqX6a80LprkVtbEuRlE58JaXyqjMW8NvGvLXNV8qCZK8xG8SrCkVnU
+KFlXgHAl3UFibm3yJOlIjHikuOaU0jlDbO/S2WfkkgV3BWQkngUKu+9gr+ItV3We
+GMidJljIoho8CqYQnLWtsjhOmjLQogsUKZJSg/riAxrDW3cCEmF4EaV/S8lNnSiL
+f49WauHsGdfIaFabl8HVG7h+R3Uh8Q==
+=JXq9
 -----END PGP SIGNATURE-----
diff --git a/letsencrypt-auto-source/letsencrypt-auto b/letsencrypt-auto-source/letsencrypt-auto
index c0f7466ae..5df7f5f30 100755
--- a/letsencrypt-auto-source/letsencrypt-auto
+++ b/letsencrypt-auto-source/letsencrypt-auto
@@ -31,7 +31,7 @@ if [ -z "$VENV_PATH" ]; then
 fi
 VENV_BIN="$VENV_PATH/bin"
 BOOTSTRAP_VERSION_PATH="$VENV_PATH/certbot-auto-bootstrap-version.txt"
-LE_AUTO_VERSION="0.40.0.dev0"
+LE_AUTO_VERSION="0.40.0"
 BASENAME=$(basename $0)
 USAGE="Usage: $BASENAME [OPTIONS]
 A self-updating wrapper script for the Certbot ACME client. When run, updates
@@ -1432,18 +1432,18 @@ letsencrypt==0.7.0 \
     --hash=sha256:105a5fb107e45bcd0722eb89696986dcf5f08a86a321d6aef25a0c7c63375ade \
     --hash=sha256:c36e532c486a7e92155ee09da54b436a3c420813ec1c590b98f635d924720de9
 
-certbot==0.39.0 \
-    --hash=sha256:f1a70651a6c5137a448f4a8db17b09af619f80a077326caae6b74278bf1db488 \
-    --hash=sha256:885cee1c4d05888af86b626cbbfc29d3c6c842ef4fe8f4a486994cef9daddfe0
-acme==0.39.0 \
-    --hash=sha256:4f8be913df289b981852042719469cc367a7e436256f232c799d0bd1521db710 \
-    --hash=sha256:a2fcb75d16de6804f4b4d773a457ee2f6434ebaf8fd1aa60862a91d4e8f73608
-certbot-apache==0.39.0 \
-    --hash=sha256:c7a8630a85b753a52ca0b8c19e24b8f85ac4ba028292a95745e250c2e72faab9 \
-    --hash=sha256:4651a0212c9ebc3087281dad92ad3cb355bb2730f432d0180a8d23325d11825a
-certbot-nginx==0.39.0 \
-    --hash=sha256:76e5862ad5cc0fbc099df3502987c101c60dee1c188a579eac990edee7a910df \
-    --hash=sha256:ceac88df52d3b27d14c3052b9e90ada327d7e14ecd6e4af7519918182d6138b4
+certbot==0.40.0 \
+    --hash=sha256:b9ff74c4f3d3e06d9c467465f97bcbb07b0f4d778d3c4232ab91583d933dba61 \
+    --hash=sha256:cff166597b3c714c3e7e60b2bcd6089135b375cadca04cf36abd15bfdb22be40
+acme==0.40.0 \
+    --hash=sha256:1b026b07a2099e50dac11cbdb834925f1d9b5691e349b52e9d397a12f3dc4eac \
+    --hash=sha256:f29c1185d1e33919bad6c1f3fece168ee191d96d47f5997117561dc74a454221
+certbot-apache==0.40.0 \
+    --hash=sha256:f1c034a05fbd6cc6fde9494f493a8a6ed0e02e7652e51af16342082bc17387e4 \
+    --hash=sha256:43c3d7628ca6630467c4f57dd30423f031c1c7cbca46f7500293172d0fe3581e
+certbot-nginx==0.40.0 \
+    --hash=sha256:55cd3c90e2851069b536859050374fe2fcfa22c3e862cc0e1811fbce9e52dccc \
+    --hash=sha256:3df8cec22910f2d41ccb4494661ff65f98c52dd441864a53a318b32979256881
 
 UNLIKELY_EOF
     # -------------------------------------------------------------------------
diff --git a/letsencrypt-auto-source/letsencrypt-auto.sig b/letsencrypt-auto-source/letsencrypt-auto.sig
index d9147680b..b961bbc91 100644
--- a/letsencrypt-auto-source/letsencrypt-auto.sig
+++ b/letsencrypt-auto-source/letsencrypt-auto.sig
diff --git a/letsencrypt-auto-source/pieces/certbot-requirements.txt b/letsencrypt-auto-source/pieces/certbot-requirements.txt
index 7d1c09069..415663f96 100644
--- a/letsencrypt-auto-source/pieces/certbot-requirements.txt
+++ b/letsencrypt-auto-source/pieces/certbot-requirements.txt
@@ -1,12 +1,12 @@
-certbot==0.39.0 \
-    --hash=sha256:f1a70651a6c5137a448f4a8db17b09af619f80a077326caae6b74278bf1db488 \
-    --hash=sha256:885cee1c4d05888af86b626cbbfc29d3c6c842ef4fe8f4a486994cef9daddfe0
-acme==0.39.0 \
-    --hash=sha256:4f8be913df289b981852042719469cc367a7e436256f232c799d0bd1521db710 \
-    --hash=sha256:a2fcb75d16de6804f4b4d773a457ee2f6434ebaf8fd1aa60862a91d4e8f73608
-certbot-apache==0.39.0 \
-    --hash=sha256:c7a8630a85b753a52ca0b8c19e24b8f85ac4ba028292a95745e250c2e72faab9 \
-    --hash=sha256:4651a0212c9ebc3087281dad92ad3cb355bb2730f432d0180a8d23325d11825a
-certbot-nginx==0.39.0 \
-    --hash=sha256:76e5862ad5cc0fbc099df3502987c101c60dee1c188a579eac990edee7a910df \
-    --hash=sha256:ceac88df52d3b27d14c3052b9e90ada327d7e14ecd6e4af7519918182d6138b4
+certbot==0.40.0 \
+    --hash=sha256:b9ff74c4f3d3e06d9c467465f97bcbb07b0f4d778d3c4232ab91583d933dba61 \
+    --hash=sha256:cff166597b3c714c3e7e60b2bcd6089135b375cadca04cf36abd15bfdb22be40
+acme==0.40.0 \
+    --hash=sha256:1b026b07a2099e50dac11cbdb834925f1d9b5691e349b52e9d397a12f3dc4eac \
+    --hash=sha256:f29c1185d1e33919bad6c1f3fece168ee191d96d47f5997117561dc74a454221
+certbot-apache==0.40.0 \
+    --hash=sha256:f1c034a05fbd6cc6fde9494f493a8a6ed0e02e7652e51af16342082bc17387e4 \
+    --hash=sha256:43c3d7628ca6630467c4f57dd30423f031c1c7cbca46f7500293172d0fe3581e
+certbot-nginx==0.40.0 \
+    --hash=sha256:55cd3c90e2851069b536859050374fe2fcfa22c3e862cc0e1811fbce9e52dccc \
+    --hash=sha256:3df8cec22910f2d41ccb4494661ff65f98c52dd441864a53a318b32979256881
diff --git a/local-oldest-requirements.txt b/local-oldest-requirements.txt
index 0acc68652..f6d158890 100644
--- a/local-oldest-requirements.txt
+++ b/local-oldest-requirements.txt
@@ -1,2 +1,2 @@
 # Remember to update setup.py to match the package versions below.
--e acme[dev]
+acme[dev]==0.40.0
diff --git a/setup.py b/setup.py
index 160726f72..8b45fd80c 100644
--- a/setup.py
+++ b/setup.py
@@ -34,7 +34,7 @@ version = meta['version']
 # specified here to avoid masking the more specific request requirements in
 # acme. See https://github.com/pypa/pip/issues/988 for more info.
 install_requires = [
-    'acme>=0.40.0.dev0',
+    'acme>=0.40.0',
     # We technically need ConfigArgParse 0.10.0 for Python 2.6 support, but
     # saying so here causes a runtime error against our temporary fork of 0.9.3
     # in which we added 2.6 support (see #2243), so we relax the requirement.