diff --git a/.github/workflows/deploy-docker-to-tst.yml b/.github/workflows/deploy-docker-to-tst.yml
index 3ab9bce..bbec732 100644
--- a/.github/workflows/deploy-docker-to-tst.yml
+++ b/.github/workflows/deploy-docker-to-tst.yml
@@ -24,6 +24,13 @@ jobs:
         with:
           name: version
           path: version.txt
+      - name: Notify Mattermost on start build
+        run: |
+          curl -X POST -H 'Content-Type: application/json' \
+          -d '{
+                "text": "🚀 *Build gestart!* Een nieuwe build [$VERSION-SNAPSHOT] is begonnen voor de repository *${{ gitea.repository }}* op branch *${{ gitea.ref }}*."
+              }' \
+          https://mattermost.melvanveen.nl/hooks/gzzhdchjiirbmdfzyw1a9cf4sh
 
       # Stap 3: Inloggen bij Docker Hub
       - name: Log in to Docker Hub
@@ -83,3 +90,11 @@ jobs:
 
             # Opruimen oude images
             docker image prune -f
+      - name: Notify Mattermost on start build
+        run: |
+          curl -X POST -H 'Content-Type: application/json' \
+          -d '{
+                "text": "🚀 *Build is geslaagd!* Versie [$VERSION-SNAPSHOT] staat klaar op https://test-paypoint.melvanveen.nl"
+              }' \
+          https://mattermost.melvanveen.nl/hooks/gzzhdchjiirbmdfzyw1a9cf4sh
+