diff --git a/Gemfile.lock b/Gemfile.lock
index 59fabfc..8475c3c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -109,7 +109,7 @@ GEM
     treetop (1.4.10)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.31)
+    tzinfo (0.3.61)
     warden (1.1.0)
       rack (>= 1.0)