diff --git a/Gemfile.lock b/Gemfile.lock
index 08d92df..8cf27d6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -112,7 +112,7 @@ GEM
     thor (0.14.6)
     treetop (1.4.9)
       polyglot (>= 0.3.1)
-    tzinfo (0.3.29)
+    tzinfo (0.3.61)
 
 PLATFORMS
   ruby