diff --git a/CHANGES.md b/CHANGES.md
index 918e7f68..203b00fa 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,6 +1,7 @@
 v0.11.7 - TBD
 ====================
 * Fix an error when seeking to the end of a WAV file.
+* Fix a memory lean with low-pass, high-pass and band-pass filters.
 
 
 v0.11.6 - 2022-01-22