diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index b667dc455..4b7be791f 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -20,7 +20,7 @@ why we ask this as well as instructions for how to proceed, see the
 
   ```bash
   brew update
-  brew install git postgresql
+  brew install git postgresql python
   ```
 
 3. Get, build, and test the code