diff --git a/CHANGELOG.md b/CHANGELOG.md
index e94a41b..0666206 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 - Site type changes [OP-3818]
 - Added Juridische vorm [OP-3816] [OP-3820]
 - Frontend [v1.39.0]
+- Added "werkingsgebied" filter [OP-3812]
 
 ### Deploy notes
 ```
@@ -16,6 +17,12 @@ drc restart migrations
 drc restart cache resource
 ```
 
+```
+drc restart migrations frontend
+# reindex elastic search:
+/bin/bash scripts/reset-elastic.sh
+```
+
 ## v1.40.0
 - Query to check missing address URI's [OP-3784]
 - Create new query 'organisations shown in OP frontend' in Dashboard [OP-3774]