diff --git a/CHANGELOG.md b/CHANGELOG.md
index fe417267..19d666a4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,6 +25,9 @@ change warranting a new major release:
 
 ## Changed
 
+- Update ACS scheduling to represent the actual ACS design. There is one ACS PST now for all
+  timing sensitive ACS operations.
+  PR: https://egit.irs.uni-stuttgart.de/eive/eive-obsw/pulls/365
 - Update and tweak ACS subsystem to represent the actual ACS design
 - Event handling in the ACS subsystem for events triggered by the ACS controller.
   PR: https://egit.irs.uni-stuttgart.de/eive/eive-obsw/pulls/365