diff --git a/charts/pgcat/Chart.yaml b/charts/pgcat/Chart.yaml
index 2a91015..00241a0 100644
--- a/charts/pgcat/Chart.yaml
+++ b/charts/pgcat/Chart.yaml
@@ -14,4 +14,4 @@ dependencies:
       - bitnami-common
     version: 2.x.x
 name: pgcat
-version: 0.2.8
+version: 0.2.9
diff --git a/charts/pgcat/templates/servicemonitor.yaml b/charts/pgcat/templates/servicemonitor.yaml
index e3cdb69..5986809 100644
--- a/charts/pgcat/templates/servicemonitor.yaml
+++ b/charts/pgcat/templates/servicemonitor.yaml
@@ -24,7 +24,7 @@ spec:
   endpoints:
     - port: metrics
       path: {{ .Values.serviceMonitor.metricPath | default "/metrics" }}
-      interval: {{ .Values.serviceMonitor.interval | default 30 }}
+      interval: {{ .Values.serviceMonitor.interval | default 30 | quote }}
       {{- if .Values.serviceMonitor.scrapeTimeout }}
       scrapeTimeout: {{ .Values.serviceMonitor.scrapeTimeout }}
       {{- end }}