diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index ac476bcce..9dca452bd 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -7,3 +7,4 @@ Delete them if they are not appropriate for this pull request.
 - [ ] I have properly documented new or changed features in the documention or in the docstrings
 - [ ] I have properly documented unusual changes to the code in the comments around it
 - [ ] I have made note of any breaking/backwards incompatible changes
+- [ ] I formatted my code using `black -t py36` 
\ No newline at end of file
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 960ecc1c0..00621b7d6 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -2,9 +2,13 @@
 
 ## Keeping/Improving code quality
  
-- Respect PEP8 standards!
+- Respect PEP8 conventions!
 - Just the right amount of comments. Try to write auto-documented code (with very explicit variable names).
 - If you introduce a new functionality or fix a subtle bug, document it in the docstring/code.
+- Moviepy's team adopted [black](https://github.com/psf/black) to autoformat the code. This is  enforced for any pull request. 
+  
+> Tip: use `black -t py36 .` to autoformat your code, or set black as a plugin of your editor. 
+
 
 ## Using Github