diff --git a/CHANGELOG.md b/CHANGELOG.md
index d44e13480..591a50579 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,3 +16,4 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - `mongo_key.bin` file location can be selected at runtime. #994
 - Monkey agents are stored in the configurable data_dir when monkey is "run
   from the island". #997
+- Reformated all code using black. #1070