diff --git a/Gemfile.lock b/Gemfile.lock
index 175ed4186..3fde3eb49 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -207,7 +207,7 @@ GEM
       capybara
       minitest (~> 5.0)
       rake
-    mocha (2.4.5)
+    mocha (2.5.0)
       ruby2_keywords (>= 0.0.5)
     msgpack (1.7.2)
     net-imap (0.5.0)