diff --git a/helm/config/default.conf b/helm/config/default.conf
index e0b2cf2..80aceed 100644
--- a/helm/config/default.conf
+++ b/helm/config/default.conf
@@ -52,6 +52,8 @@ server {
     uwsgi_read_timeout {{ .Values.mapproxy.uwsgi.timeoutSeconds }};
     uwsgi_send_timeout {{ .Values.mapproxy.uwsgi.timeoutSeconds }};
     uwsgi_connect_timeout {{ .Values.mapproxy.uwsgi.timeoutSeconds }};
+    # In case you use "add_header" in the location block, this "add_header" will be ignored!
+    add_header 'Access-Control-Max-Age' '{{ .Values.nginx.headers.accessControlMaxAge | default "7200" }}';
     location /liveness {
         access_log    off;
         log_not_found off;
diff --git a/helm/values.yaml b/helm/values.yaml
index a11523c..a1a5297 100644
--- a/helm/values.yaml
+++ b/helm/values.yaml
@@ -220,6 +220,8 @@ nginx:
     inactive: 60m
     expirationTime: 60m
     useTempPath: "off"
+  headers:
+    accessControlMaxAge: ''
 
   port: 8080
   internalServicePort: 80