diff --git a/activemodel/lib/active_model/secure_password.rb b/activemodel/lib/active_model/secure_password.rb
index <HASH>..<HASH> 100644
--- a/activemodel/lib/active_model/secure_password.rb
+++ b/activemodel/lib/active_model/secure_password.rb
@@ -4,8 +4,8 @@ module ActiveModel
   module SecurePassword
     extend ActiveSupport::Concern
 
-    # BCrypt hash function can handle maximum 72 characters, and if we pass
-    # password of length more than 72 characters it ignores extra characters.
+    # BCrypt hash function can handle maximum 72 bytes, and if we pass
+    # password of length more than 72 bytes it ignores extra characters.
     # Hence need to put a restriction on password length.
     MAX_PASSWORD_LENGTH_ALLOWED = 72
 
@@ -20,7 +20,7 @@ module ActiveModel
       #
       # The following validations are added automatically:
       # * Password must be present on creation
-      # * Password length should be less than or equal to 72 characters
+      # * Password length should be less than or equal to 72 bytes
       # * Confirmation of password (using a +password_confirmation+ attribute)
       #
       # If password confirmation validation is not needed, simply leave out the
Talk about bytes not characters

[ci skip]

Closes #<I>