diff --git a/Gemfile.lock b/Gemfile.lock
index 7b331fe..f8fb7c2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,7 +13,7 @@ GEM
       mime-types-data (~> 3.2015)
     mime-types-data (3.2018.0812)
     minitest (5.11.3)
-    mocha (1.7.0)
+    mocha (1.8.0)
       metaclass (~> 0.0.1)
     multi_xml (0.6.0)
     mustermann (1.0.3)