diff --git a/CHANGELOG.md b/CHANGELOG.md
index bfcde386..0e5bc831 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 #### New Features
 
+* [#21](https://github.com/SamR1/Fittrackee/issues/21) - Document the API
 
 #### Bugs Fixed