diff --git a/Gemfile.lock b/Gemfile.lock
index bb66b380f..b151ee2d3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -226,7 +226,7 @@ GEM
     mini_magick (4.12.0)
     mini_mime (1.1.5)
     mini_portile2 (2.8.4)
-    minitest (5.19.0)
+    minitest (5.20.0)
     msgpack (1.7.2)
     multi_json (1.15.0)
     nenv (0.3.0)