diff --git a/CHANGELOG.md b/CHANGELOG.md
index c03c7d7..d27fdb4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,10 @@ Features:
 * new command-line option `--log-level` to control which status messages should be shown
 * new command-line option `--warnings-as-errors` to abort program execution upon warnings (replaces `--warning-level`)
 
+Internal:
+
+* reimplemented PDDL parser from scratch as stand-alone library `pddlparse`
+
 ## 3.0.3 (2016-09-02)
 
 Bug Fixes: