diff --git a/CHANGES b/CHANGES
index 284c95d0..0e72642a 100644
--- a/CHANGES
+++ b/CHANGES
@@ -66,6 +66,8 @@ Version 1.0
 - Don't leak exception info of already catched exceptions to context teardown
   handlers (pull request ``#1393``).
 - Allow custom Jinja environment subclasses (pull request ``#1422``).
+- Updated extension dev guidelines.
+
 
 Version 0.10.2
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