1 files changed, 12 insertions, 3 deletions
diff --git a/node_modules/npm-user-validate/npm-user-validate.js b/node_modules/npm-user-validate/npm-user-validate.js
index 3a645ec93..9250ce33a 100644
--- a/node_modules/npm-user-validate/npm-user-validate.js
+++ b/node_modules/npm-user-validate/npm-user-validate.js
@@ -1,19 +1,23 @@
 exports.email = email
 exports.pw = pw
 exports.username = username
-
 var requirements = exports.requirements = {
   username: {
     length: 'Name length must be less than or equal to 214 characters long',
     lowerCase: 'Name must be lowercase',
     urlSafe: 'Name may not contain non-url-safe chars',
-    dot: 'Name may not start with "."'
+    dot: 'Name may not start with "."',
+    illegal: 'Name may not contain illegal character'
   },
   password: {},
   email: {
     valid: 'Email must be an email address'
   }
-};
+}
+
+var illegalCharacterRe = new RegExp('([' + [
+  "'"
+].join() + '])')
 
 function username (un) {
   if (un !== un.toLowerCase()) {
@@ -32,6 +36,11 @@ function username (un) {
     return new Error(requirements.username.length)
   }
 
+  var illegal = un.match(illegalCharacterRe)
+  if (illegal) {
+    return new Error(requirements.username.illegal + ' "' + illegal[0] + '"')
+  }
+
   return null
 }