diff --git a/Gemfile b/Gemfile
index 578cafb..c8d6010 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 gemspec
 
-gem 'minitest', '~> 5.11'
+gem 'minitest', '~> 5.16'
 gem 'minitest-ci', '~> 3.4'
 gem 'minitest-reporters', '~> 1.3'
 gem 'rake', '~> 13.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 76da4df..b7d37a9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,7 +10,7 @@ GEM
     ast (2.4.2)
     builder (3.2.4)
     json (2.6.2)
-    minitest (5.16.2)
+    minitest (5.16.3)
     minitest-ci (3.4.0)
       minitest (>= 5.0.6)
     minitest-reporters (1.5.0)
@@ -56,7 +56,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
-  minitest (~> 5.11)
+  minitest (~> 5.16)
   minitest-ci (~> 3.4)
   minitest-reporters (~> 1.3)
   rake (~> 13.0)