diff --git a/Gemfile b/Gemfile
index 2ec6fc10a..653dd73b4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -172,7 +172,7 @@ gem "rubyzip", "2.3.2", require: "zip"
 # https://github.com/gitlabhq/gitlabhq/issues/3826
 # https://github.com/gitlabhq/gitlabhq/pull/3852
 # https://github.com/discourse/discourse/pull/238
-gem "minitest",  "5.15.0"
+gem "minitest", "5.18.1"
 
 gem "versionist", "2.0.1"
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 8addc9700..bb6d8539c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -431,7 +431,7 @@ GEM
     mini_magick (4.12.0)
     mini_mime (1.1.2)
     mini_portile2 (2.8.2)
-    minitest (5.15.0)
+    minitest (5.18.1)
     mobile-fu (1.4.0)
       rack-mobile-detect
       rails
@@ -839,7 +839,7 @@ DEPENDENCIES
   listen (= 3.7.1)
   logging-rails (= 0.6.0)
   mini_magick (= 4.12.0)
-  minitest (= 5.15.0)
+  minitest (= 5.18.1)
   mobile-fu (= 1.4.0)
   mysql2 (= 0.5.5)
   net-imap