diff --git a/Gemfile.lock b/Gemfile.lock
index b9fa68d4a..bc9c539ef 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -131,7 +131,7 @@ GEM
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    test-unit (3.6.3)
+    test-unit (3.6.4)
       power_assert
     timers (4.3.5)
     ttfunk (1.8.0)