diff --git a/gems.rb b/gems.rb
index 821fc191..033959f1 100644
--- a/gems.rb
+++ b/gems.rb
@@ -14,5 +14,7 @@
 	gem "utopia-project"
 end
 
+gem "io-event", git: "https://github.com/socketry/io-event", branch: "debug"
+
 # gem "async-rspec", path: "../async-rspec"
 # gem "rspec-files", path: "../rspec-files"