diff --git a/Gemfile b/Gemfile
index 3dcce6b..ee56d2f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,4 +7,4 @@ gemspec
 gem 'irb'
 gem 'rake', '~> 13.4'
 
-gem 'minitest', '~> 5.16'
+gem 'minitest', '~> 6.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 8fe2f5a..e71d66f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,6 +7,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     date (3.5.1)
+    drb (2.2.3)
     erb (6.0.4)
     io-console (0.8.2)
     irb (1.18.0)
@@ -14,7 +15,9 @@ GEM
       prism (>= 1.3.0)
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
-    minitest (5.27.0)
+    minitest (6.0.5)
+      drb (~> 2.0)
+      prism (~> 1.5)
     pp (0.6.3)
       prettyprint
     prettyprint (0.2.0)
@@ -38,16 +41,17 @@ PLATFORMS
 DEPENDENCIES
   date_values!
   irb
-  minitest (~> 5.16)
+  minitest (~> 6.0)
   rake (~> 13.4)
 
 CHECKSUMS
   date (3.5.1) sha256=750d06384d7b9c15d562c76291407d89e368dda4d4fff957eb94962d325a0dc0
   date_values (0.2.4)
+  drb (2.2.3) sha256=0b00d6fdb50995fe4a45dea13663493c841112e4068656854646f418fda13373
   erb (6.0.4) sha256=38e3803694be357fe2bfe312487c74beaf9fb4e5beb3e22498952fe1645b95d9
   io-console (0.8.2) sha256=d6e3ae7a7cc7574f4b8893b4fca2162e57a825b223a177b7afa236c5ef9814cc
   irb (1.18.0) sha256=de9454a0703a54704b9811a5ef31a60c86949fbf4013fcf244fabc7c775248e3
-  minitest (5.27.0) sha256=2d3b17f8a36fe7801c1adcffdbc38233b938eb0b4966e97a6739055a45fa77d5
+  minitest (6.0.5) sha256=f007d7246bf4feea549502842cd7c6aba8851cdc9c90ba06de9c476c0d01155c
   pp (0.6.3) sha256=2951d514450b93ccfeb1df7d021cae0da16e0a7f95ee1e2273719669d0ab9df6
   prettyprint (0.2.0) sha256=2bc9e15581a94742064a3cc8b0fb9d45aae3d03a1baa6ef80922627a0766f193
   prism (1.9.0) sha256=7b530c6a9f92c24300014919c9dcbc055bf4cdf51ec30aed099b06cd6674ef85