diff --git a/lib/omniauth/version.rb b/lib/omniauth/version.rb
index 41b49aa..7a73589 100644
--- a/lib/omniauth/version.rb
+++ b/lib/omniauth/version.rb
@@ -1,3 +1,3 @@
 module OmniAuth
-  VERSION = '1.3.1'
+  VERSION = '1.3.1'.freeze
 end