diff --git a/charts/priobike-mqtt-authenticator/Chart.yaml b/charts/priobike-mqtt-authenticator/Chart.yaml
index eabad36..2ffbe89 100644
--- a/charts/priobike-mqtt-authenticator/Chart.yaml
+++ b/charts/priobike-mqtt-authenticator/Chart.yaml
@@ -15,7 +15,7 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.2.0
+version: 0.3.0
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to
diff --git a/charts/priobike-mqtt-authenticator/templates/config-map.yaml b/charts/priobike-mqtt-authenticator/templates/config-map.yaml
index 36c1419..b848cc3 100644
--- a/charts/priobike-mqtt-authenticator/templates/config-map.yaml
+++ b/charts/priobike-mqtt-authenticator/templates/config-map.yaml
@@ -3,4 +3,4 @@ kind: ConfigMap
 metadata:
   name: priobike-mqtt-authenticator-config
 data:
-  PORT: {{ .Values.containerPort | quote }}
+  PORT: :{{ .Values.containerPort }}