diff --git a/Gemfile.lock b/Gemfile.lock
index ef213df6..444d6961 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -254,7 +254,7 @@ GEM
     mini_magick (4.12.0)
     mini_mime (1.1.5)
     minitest (5.23.1)
-    mocha (2.3.0)
+    mocha (2.4.0)
       ruby2_keywords (>= 0.0.5)
     msgpack (1.7.2)
     net-http (0.4.1)