diff --git a/Gemfile b/Gemfile
index 5707f3a..97dbf09 100644
--- a/Gemfile
+++ b/Gemfile
@@ -29,7 +29,7 @@ gem 'glogin', '0.10.0'
 gem 'haml', '5.0.4'
 gem 'iri', '0.5.0'
 gem 'loog', '0.2.1'
-gem 'minitest', '5.16.3', require: false
+gem 'minitest', '5.25.2', require: false
 gem 'minitest-reporters', '1.5.0', require: false
 gem 'pgtk', '0.7.5'
 gem 'rack', '2.1.4.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index fa2d711..6a5a573 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -89,7 +89,7 @@ GEM
       sinatra
       thin
     mini_portile2 (2.8.2)
-    minitest (5.16.3)
+    minitest (5.25.2)
     minitest-reporters (1.5.0)
       ansi
       builder
@@ -292,7 +292,7 @@ DEPENDENCIES
   haml (= 5.0.4)
   iri (= 0.5.0)
   loog (= 0.2.1)
-  minitest (= 5.16.3)
+  minitest (= 5.25.2)
   minitest-reporters (= 1.5.0)
   pgtk (= 0.7.5)
   rack (= 2.1.4.1)