3 files changed, 3 insertions, 3 deletions

diff --git a/install.sh b/install.sh
index 59be30ce..d8e95e22 100644
--- a/install.sh
+++ b/install.sh
@@ -53,7 +53,7 @@ is_ip() {
     is_ipv4 "$1" || is_ipv6 "$1"
 }
 is_domain() {
-    [[ "$1" =~ ^([A-Za-z0-9](-*[A-Za-z0-9])*)\.([A-Za-z]{2,})$ ]] && return 0 || return 1
+    [[ "$1" =~ ^([A-Za-z0-9](-*[A-Za-z0-9])*\.)+(xn--[a-z0-9]{2,}|[A-Za-z]{2,})$ ]] && return 0 || return 1
 }
 
 # Port helpers
diff --git a/update.sh b/update.sh
index 800841f5..91c37c37 100755
--- a/update.sh
+++ b/update.sh
@@ -78,7 +78,7 @@ is_ip() {
     is_ipv4 "$1" || is_ipv6 "$1"
 }
 is_domain() {
-    [[ "$1" =~ ^([A-Za-z0-9](-*[A-Za-z0-9])*\.)+[A-Za-z]{2,}$ ]] && return 0 || return 1
+    [[ "$1" =~ ^([A-Za-z0-9](-*[A-Za-z0-9])*\.)+(xn--[a-z0-9]{2,}|[A-Za-z]{2,})$ ]] && return 0 || return 1
 }
 
 # Port helpers
diff --git a/x-ui.sh b/x-ui.sh
index 4dda45a0..07aaddc6 100644
--- a/x-ui.sh
+++ b/x-ui.sh
@@ -47,7 +47,7 @@ is_ip() {
     is_ipv4 "$1" || is_ipv6 "$1"
 }
 is_domain() {
-    [[ "$1" =~ ^([A-Za-z0-9](-*[A-Za-z0-9])*\.)+[A-Za-z]{2,}$ ]] && return 0 || return 1
+    [[ "$1" =~ ^([A-Za-z0-9](-*[A-Za-z0-9])*\.)+(xn--[a-z0-9]{2,}|[A-Za-z]{2,})$ ]] && return 0 || return 1
 }
 
 # check root