diff --git a/activeagent.gemspec b/activeagent.gemspec
index 7bb4fbbf..8ee5fa50 100644
--- a/activeagent.gemspec
+++ b/activeagent.gemspec
@@ -35,7 +35,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "ostruct"
   spec.add_development_dependency "puma"
   spec.add_development_dependency "sqlite3"
-  spec.add_development_dependency "minitest", "~> 5.0"
+  spec.add_development_dependency "minitest", "~> 6.0"
   spec.add_development_dependency "vcr"
   spec.add_development_dependency "webmock"