diff --git a/docs/CONTRIBUTING.md b/docs/CONTRIBUTING.md
index 3567dee1..e1c9dada 100644
--- a/docs/CONTRIBUTING.md
+++ b/docs/CONTRIBUTING.md
@@ -18,7 +18,7 @@ Developing
 #### Common
 
 - [NodeJS](https://nodejs.org) (at least v6)
-- [Python](https://www.python.org)
+- [Python 2.7](https://www.python.org)
 - [jq](https://stedolan.github.io/jq/)
 - [curl](https://curl.haxx.se/)