diff --git a/Jenkinsfile b/Jenkinsfile
index 6d2f479..465961b 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -80,6 +80,38 @@ pipeline {
                 }
             }
         }
+
+        stage('Update helm chart repository') {
+            when {
+                branch 'development'
+            }
+            steps {
+                script {
+                    def newTag = "0.${env.BUILD_ID}"
+                    def chartRepo = "https://jenkins:${env.TOKEN}@gitea.innovation-hub-niedersachsen.de/innohub/charts.git"
+                    def chartPath = "tatort-dev/tatort"
+
+                    sh """
+                    rm -rf charts-tmp
+                    git clone ${chartRepo} charts-tmp
+                    cd charts-tmp/${chartPath}
+
+                    # update image tag in values.yaml
+                    sed -i 's/^  tag: .*/  tag: ${newTag}/' values.yaml
+
+                    # optional: bump version in Chart.yaml
+                    sed -i 's/^version: .*/version: ${newTag}/' Chart.yaml
+                    sed -i 's/^appVersion: .*/appVersion: ${newTag}/' Chart.yaml
+
+                    git config user.name 'Jenkins'
+                    git config user.email 'jenkins@innohub.local'
+                    git add values.yaml Chart.yaml
+                    git commit -m 'ci: update tatort-dev chart with image tag ${newTag}'
+                    git push origin main
+                    """
+                }
+            }
+        }
     }
 
     post {