diff --git a/Gemfile.lock b/Gemfile.lock
index 4006d03..d7da4d8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -101,7 +101,7 @@ GEM
     treetop (1.4.10)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.33)
+    tzinfo (0.3.61)
 
 PLATFORMS
   java