diff --git a/Gemfile.lock b/Gemfile.lock
index b6e1f26..f165d34 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -132,7 +132,7 @@ GEM
     marcel (1.0.4)
     mini_mime (1.1.5)
     minitest (5.25.2)
-    mocha (2.5.0)
+    mocha (2.6.0)
       ruby2_keywords (>= 0.0.5)
     msgpack (1.7.2)
     net-http (0.5.0)