diff --git a/Gemfile.lock b/Gemfile.lock
index dcb8f5cd..bfea5bff 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -51,7 +51,7 @@ GEM
     minitest (5.24.1)
     minitest-hooks (1.5.1)
       minitest (> 5.3)
-    mocha (2.1.0)
+    mocha (2.4.5)
       ruby2_keywords (>= 0.0.5)
     mutex_m (0.2.0)
     nokogiri (1.15.6)