diff --git a/Gemfile.lock b/Gemfile.lock
index feb894f..64a1209 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,7 +14,7 @@ GEM
       libv8 (~> 3.16.14.0)
       ref
     timecop (0.3.5)
-    tzinfo (0.3.27)
+    tzinfo (0.3.61)
     xspec (0.0.2)
 
 PLATFORMS