diff --git a/Gemfile.lock b/Gemfile.lock
index 7fff00406..20bbe20ec 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -434,7 +434,7 @@ GEM
       rack (>= 1.0.0)
     thor (0.16.0)
     tilt (1.3.3)
-    timecop (0.3.5)
+    timecop (0.4.6)
     treetop (1.4.10)
       polyglot
       polyglot (>= 0.3.1)