diff --git a/Gemfile.lock b/Gemfile.lock
index 42e8c54..fc14b40 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -100,7 +100,7 @@ GEM
     treetop (1.4.10)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.31)
+    tzinfo (0.3.61)
 
 PLATFORMS
   ruby