diff --git a/Gemfile.lock b/Gemfile.lock
index 039f32047593..7c842e3e3eaf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -30,7 +30,7 @@ GEM
     faraday-retry (1.0.3)
     fastimage (2.2.6)
     method_source (1.0.0)
-    minitest (5.15.0)
+    minitest (5.18.0)
     multipart-post (2.1.1)
     octokit (4.22.0)
       faraday (>= 0.9)