diff --git a/Jenkinsfile b/Jenkinsfile
index 465961b..ea554d6 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -81,38 +81,40 @@ pipeline {
             }
         }
 
-        stage('Update helm chart repository') {
+        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"
+                withCredentials([usernamePassword(credentialsId: 'JenkinsGitea', usernameVariable: 'GIT_USER', passwordVariable: 'GIT_PAT')]) {
+                    script {
+                        def newTag = "0.${env.BUILD_ID}"
+                        def chartRepo = "https://${GIT_USER}:${GIT_PAT}@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}
+                        sh """
+                        # Clean clone
+                        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
+                        # Update values.yaml image tag
+                        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
+                        # Optional: bump chart version and appVersion
+                        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
-                    """
+                        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 {
         success {