diff --git a/readme.markdown b/readme.markdown
index a3e6dfe4..9cb5492e 100644
--- a/readme.markdown
+++ b/readme.markdown
@@ -131,6 +131,7 @@ By default, uncaught exceptions in your tests will not be intercepted, and will
 - ES6 support with https://www.npmjs.com/package/babel-tape-runner or https://www.npmjs.com/package/buble-tape-runner
 - Different test syntax with https://github.com/pguth/flip-tape (warning: mutates String.prototype)
 - Electron test runner with https://github.com/tundrax/electron-tap
+- Concurrency support with https://github.com/imsnif/mixed-tape
 
 # methods