diff --git a/Gemfile.lock b/Gemfile.lock
index b65c7ac7..df2ffefe 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -169,7 +169,7 @@ GEM
     treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.48)
+    tzinfo (0.3.61)
     uber (0.0.6)
     userstamp (2.0.1)
     uuidtools (2.1.5)