diff --git a/Gemfile.lock b/Gemfile.lock
index 34ae689..3af505c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -85,7 +85,7 @@ GEM
     treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.42)
+    tzinfo (0.3.61)
     unicorn (4.6.3)
       kgio (~> 2.6)
       rack