diff --git a/Gemfile b/Gemfile
index 3d6858e..6da9ef9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,7 +12,7 @@ gem 'tilt', '~> 2.0.10'
 # Testing and metrics (not necessary in production)
 group :test do
   gem 'codecov',   '~> 0.6.0',  require: false
-  gem 'minitest',  '~> 5.17.0'
+  gem 'minitest',  '~> 5.20.0'
   gem 'rack-test', '~> 2.0.2'
   gem 'rake',      '~> 13.0.6'
   gem 'rspec',     '~> 3.12.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 8423874..cfc1a58 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,7 +5,7 @@ GEM
       simplecov (>= 0.15, < 0.22)
     diff-lcs (1.5.0)
     docile (1.4.0)
-    minitest (5.17.0)
+    minitest (5.20.0)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     rack (2.2.7)
@@ -53,7 +53,7 @@ PLATFORMS
 
 DEPENDENCIES
   codecov (~> 0.6.0)
-  minitest (~> 5.17.0)
+  minitest (~> 5.20.0)
   rack-test (~> 2.0.2)
   rake (~> 13.0.6)
   require_all (~> 3.0.0)