diff --git a/Gemfile.lock b/Gemfile.lock
index cf8ea184f..ec4912935 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -183,7 +183,7 @@ GEM
     mini_mime (1.0.0)
     mini_portile2 (2.3.0)
     minitest (5.11.3)
-    mocha (1.5.0)
+    mocha (1.6.0)
       metaclass (~> 0.0.1)
     money (6.12.0)
       i18n (>= 0.6.4, < 1.1)