diff --git a/Gemfile.lock b/Gemfile.lock
index 5154b6f..dc92a23 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -115,7 +115,7 @@ GEM
     treetop (1.4.10)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.31)
+    tzinfo (0.3.61)
 
 PLATFORMS
   ruby