diff --git a/README.md b/README.md
index 882b046..24874f6 100644
--- a/README.md
+++ b/README.md
@@ -43,6 +43,7 @@ If you are an open source project maintainer, add the label `first-timers-only`
 
 - [catapult](https://github.com/catapult-project/catapult/labels/Good%20First%20Bug) _(label: Good First Bug)_
 - [Python Babel](https://github.com/python-babel/babel/labels/easy) _(label: easy)_
+- [mitmproxy](https://github.com/mitmproxy/mitmproxy/labels/good%20first%20contribution) _(label: good first contribution)_
 
 ## Ruby