diff --git a/Gemfile.lock b/Gemfile.lock
index b4bdbc0..8c45bc5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -207,7 +207,7 @@ GEM
       sprockets (>= 3.0.0)
     thor (1.1.0)
     thread_safe (0.3.6)
-    tzinfo (1.2.9)
+    tzinfo (1.2.11)
       thread_safe (~> 0.1)
     unicode-display_width (1.7.0)
     wasabi (3.5.0)