diff --git a/Gemfile.lock b/Gemfile.lock
index 7fe8ac321..7efec5b84 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -248,7 +248,7 @@ GEM
     mini_mime (1.1.5)
     mini_portile2 (2.8.7)
     minitest (5.23.1)
-    mocha (2.3.0)
+    mocha (2.4.0)
       ruby2_keywords (>= 0.0.5)
     msgpack (1.7.2)
     multi_xml (0.6.0)