diff --git a/Gemfile b/Gemfile
index ce5365ab..a35fb3c5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ gem "rake"
 gem "uuid"
 
 group :test do
-  gem "minitest", '< 5.0'
+  gem "minitest", '< 6.0'
   gem "pry"
   gem 'simplecov'
   gem 'simplecov-cobertura' # for submitting code coverage results to codecov.io
diff --git a/Gemfile.lock b/Gemfile.lock
index 32bcb14c..d7203325 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,12 +24,11 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (4.0.13)
-      i18n (~> 0.6, >= 0.6.9)
-      minitest (~> 4.2)
-      multi_json (~> 1.3)
-      thread_safe (~> 0.1)
-      tzinfo (~> 0.3.37)
+    activesupport (7.0.4.2)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
     addressable (2.8.1)
       public_suffix (>= 2.0.2, < 6.0)
     builder (3.2.4)
@@ -68,7 +67,7 @@ GEM
     http-accept (1.7.0)
     http-cookie (1.0.5)
       domain_name (~> 0.5)
-    i18n (0.9.5)
+    i18n (1.12.0)
       concurrent-ruby (~> 1.0)
     json_pure (2.6.3)
     macaddr (1.7.2)
@@ -77,8 +76,7 @@ GEM
     mime-types (3.4.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2022.0105)
-    minitest (4.7.5)
-    multi_json (1.15.0)
+    minitest (5.17.0)
     multipart-post (2.3.0)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
@@ -131,9 +129,9 @@ GEM
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
-    thread_safe (0.3.6)
     tilt (2.0.11)
-    tzinfo (0.3.61)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.8.2)
@@ -150,7 +148,7 @@ DEPENDENCIES
   cube-ruby
   faraday (~> 1.9)
   goo!
-  minitest (< 5.0)
+  minitest (< 6.0)
   pry
   rack-accept
   rack-post-body-to-params