diff --git a/API.md b/API.md
index 149ce84..344c003 100644
--- a/API.md
+++ b/API.md
@@ -261,6 +261,7 @@ const ploneOptions: PloneOptions = { ... }
 | <code><a href="#@bluedynamics/cdk8s-plone.PloneOptions.property.backend">backend</a></code> | <code><a href="#@bluedynamics/cdk8s-plone.PloneBaseOptions">PloneBaseOptions</a></code> | *No description.* |
 | <code><a href="#@bluedynamics/cdk8s-plone.PloneOptions.property.frontend">frontend</a></code> | <code><a href="#@bluedynamics/cdk8s-plone.PloneBaseOptions">PloneBaseOptions</a></code> | *No description.* |
 | <code><a href="#@bluedynamics/cdk8s-plone.PloneOptions.property.imagePullSecrets">imagePullSecrets</a></code> | <code>string[]</code> | *No description.* |
+| <code><a href="#@bluedynamics/cdk8s-plone.PloneOptions.property.siteId">siteId</a></code> | <code>string</code> | *No description.* |
 | <code><a href="#@bluedynamics/cdk8s-plone.PloneOptions.property.version">version</a></code> | <code>string</code> | *No description.* |
 
 ---
@@ -295,6 +296,16 @@ public readonly imagePullSecrets: string[];
 
 ---
 
+##### `siteId`<sup>Optional</sup> <a name="siteId" id="@bluedynamics/cdk8s-plone.PloneOptions.property.siteId"></a>
+
+```typescript
+public readonly siteId: string;
+```
+
+- *Type:* string
+
+---
+
 ##### `version`<sup>Optional</sup> <a name="version" id="@bluedynamics/cdk8s-plone.PloneOptions.property.version"></a>
 
 ```typescript
diff --git a/src/plone.ts b/src/plone.ts
index 97db3ee..6806333 100644
--- a/src/plone.ts
+++ b/src/plone.ts
@@ -17,6 +17,7 @@ export interface PloneBaseOptions {
 }
 export interface PloneOptions {
   readonly version?: string;
+  readonly siteId?: string;
   readonly backend?: PloneBaseOptions;
   readonly frontend?: PloneBaseOptions;
   readonly imagePullSecrets?: string[];
@@ -30,6 +31,10 @@ export class Plone extends Construct {
   constructor(scope: Construct, id: string, options: PloneOptions = {}) {
     super(scope, id);
 
+    // ------------------------------------------------------------------------
+    // General
+    const siteId = options.siteId ?? 'Plone';
+
     // ------------------------------------------------------------------------
     // Backend
     const backend = options.backend ?? {};
@@ -134,7 +139,7 @@ export class Plone extends Construct {
     var frontendEnvironment = frontend.environment ?? new kplus.Env([], {});
     if (frontendEnvironment.variables.RAZZLE_INTERNAL_API_PATH === undefined) {
       // connect with backend service
-      frontendEnvironment?.addVariable('RAZZLE_INTERNAL_API_PATH', kplus.EnvValue.fromValue(`http://${backendService.name}:${backendPort}`));
+      frontendEnvironment?.addVariable('RAZZLE_INTERNAL_API_PATH', kplus.EnvValue.fromValue(`http://${backendService.name}:${backendPort}/${siteId}`));
     }
 
     // Deployment
diff --git a/test/__snapshots__/plone.test.ts.snap b/test/__snapshots__/plone.test.ts.snap
index 6b6de6a..f922c08 100644
--- a/test/__snapshots__/plone.test.ts.snap
+++ b/test/__snapshots__/plone.test.ts.snap
@@ -151,7 +151,7 @@ exports[`defaults 1`] = `
               "env": [
                 {
                   "name": "RAZZLE_INTERNAL_API_PATH",
-                  "value": "http://app-plone-backend-service-c8efef4c:8080",
+                  "value": "http://app-plone-backend-service-c8efef4c:8080/Plone",
                 },
               ],
               "envFrom": [],
@@ -391,7 +391,7 @@ exports[`defaults-with-pdps 1`] = `
               "env": [
                 {
                   "name": "RAZZLE_INTERNAL_API_PATH",
-                  "value": "http://app-plone_with_pdbs-backend-service-c819541f:8080",
+                  "value": "http://app-plone_with_pdbs-backend-service-c819541f:8080/Plone",
                 },
               ],
               "envFrom": [],