diff --git a/Gemfile.lock b/Gemfile.lock
index 90383eff3..e29175fa6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -200,7 +200,7 @@ GEM
     sync (0.5.0)
     term-ansicolor (1.7.1)
       tins (~> 1.0)
-    test-unit (3.5.3)
+    test-unit (3.5.5)
       power_assert
     test-unit-context (0.5.1)
       test-unit (>= 2.4.0)