diff --git a/sample_app/Gemfile.lock b/sample_app/Gemfile.lock
index 54b6f2ba..da7b9b6c 100644
--- a/sample_app/Gemfile.lock
+++ b/sample_app/Gemfile.lock
@@ -134,7 +134,7 @@ GEM
     treetop (1.4.14)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.37)
+    tzinfo (0.3.61)
     xpath (2.0.0)
       nokogiri (~> 1.3)