diff --git a/templates/deployment.yaml b/templates/deployment.yaml
index 4633e55..3e0b719 100644
--- a/templates/deployment.yaml
+++ b/templates/deployment.yaml
@@ -17,6 +17,7 @@ spec:
       annotations:
         {{- toYaml . | nindent 8 }}
       {{- end }}
+        checksum/config: {{ include (print $.Template.BasePath "/configmap.yaml" ) . | sha256sum }}
       labels:
         {{- include "openresty.labels" . | nindent 8 }}
         {{- with .Values.podLabels }}