diff --git a/counter/Gemfile.lock b/counter/Gemfile.lock
index c797c96..5fc726e 100644
--- a/counter/Gemfile.lock
+++ b/counter/Gemfile.lock
@@ -269,7 +269,7 @@ GEM
     thor (1.0.1)
     thread_safe (0.3.6)
     tilt (2.0.10)
-    tzinfo (1.2.7)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     unf (0.1.4)
       unf_ext