diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 729c60209..fd17051b9 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1271,11 +1271,6 @@ Style/StderrPuts:
     - 'config/environment.rb'
     - 'config/initializers/10-patches.rb'
 
-# This cop supports unsafe autocorrection (--autocorrect-all).
-Style/StringChars:
-  Exclude:
-    - 'app/models/user.rb'
-
 # This cop supports unsafe autocorrection (--autocorrect-all).
 # Configuration parameters: Mode.
 Style/StringConcatenation:
diff --git a/app/models/user.rb b/app/models/user.rb
index 2d012fa41..2f4baba58 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -371,7 +371,7 @@ class User < Principal
     end
     chars = chars_list.flatten
     length.times {password << chars[SecureRandom.random_number(chars.size)]}
-    password = password.split('').shuffle(random: SecureRandom).join
+    password = password.chars.shuffle(random: SecureRandom).join
     self.password = password
     self.password_confirmation = password
     self