diff --git a/Gemfile.lock b/Gemfile.lock
index 77f380f4..7bc5fab6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -216,7 +216,7 @@ GEM
       libv8-node (~> 24.1.0.0)
     minitest (5.26.0)
     minitest-stub-const (0.6)
-    mocha (2.8.2)
+    mocha (3.0.0)
       ruby2_keywords (>= 0.0.5)
     mutex_m (0.3.0)
     mysql2 (0.5.7)