diff --git a/spec/dummy/Gemfile.lock b/spec/dummy/Gemfile.lock
index 776d849..608985b 100644
--- a/spec/dummy/Gemfile.lock
+++ b/spec/dummy/Gemfile.lock
@@ -63,7 +63,7 @@ GEM
     thor (0.14.6)
     treetop (1.4.9)
       polyglot (>= 0.3.1)
-    tzinfo (0.3.24)
+    tzinfo (0.3.61)
 
 PLATFORMS
   ruby