diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2eceb7e6fc09ff58624ae06e9ac166cff6d0ec66..94821bbb41710a11868c9988d5e1b2d4b3217bfe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -64,6 +64,7 @@
 coming soon ...
 
 ## Features
+- added the data processing module `proc_functions`
 
 ## Bugfixes
 - `spikes_flagRaise` - overestimation of value courses average fixed