diff --git a/__tests__/api.ts b/__tests__/api.ts
index a846a288..3d0869db 100644
--- a/__tests__/api.ts
+++ b/__tests__/api.ts
@@ -79,6 +79,7 @@ describe('setting of response header `Access-Control-Allow-Origin`', () => {
       'http://localhost:3000',
       'http://localhost:3001',
       'https://frontend-7md9ymhyw-serlo.vercel.app',
+      'https://chancencampus.org',
     ]
 
     describe('when we are in the staging environment, the same value is sent back in `Access-Control-Allow-Origin`', () => {
@@ -94,7 +95,7 @@ describe('setting of response header `Access-Control-Allow-Origin`', () => {
       })
     })
 
-    describe('when we are in the production environment, the current domain is sent back in `Access-Control-Allow-Origin`', () => {
+    describe('when we are in the production environment, the current domain or chancencampus.org is sent back in `Access-Control-Allow-Origin`', () => {
       test.each(domains)('when `Origin` is `%s`', async (origin) => {
         const env = currentTestEnvironmentWhen(
           (conf) => conf.ENVIRONMENT === 'production',
@@ -103,9 +104,15 @@ describe('setting of response header `Access-Control-Allow-Origin`', () => {
 
         const response = await fetchApi({ headers: { Origin: origin } }, env)
 
-        expect(response.headers.get('Access-Control-Allow-Origin')).toBe(
-          `https://${env.getDomain()}`,
-        )
+        if (origin == 'https://chancencampus.org') {
+          expect(response.headers.get('Access-Control-Allow-Origin')).toBe(
+            'https://chancencampus.org',
+          )
+        } else {
+          expect(response.headers.get('Access-Control-Allow-Origin')).toBe(
+            `https://${env.getDomain()}`,
+          )
+        }
       })
     })
   })
diff --git a/src/api.ts b/src/api.ts
index 16795dec..ee6c3bc2 100644
--- a/src/api.ts
+++ b/src/api.ts
@@ -73,7 +73,8 @@ function getAllowedOrigin(requestOrigin: string | null, env: CFEnvironment) {
               url.port === '8000' ||
               url.port === '8080')) ||
             url.hostname.includes('-serlo.vercel.app'))) ||
-        url.hostname.includes('.adornis.de')
+        url.hostname.includes('.adornis.de') ||
+        url.domain === 'chancencampus.org'
       ) {
         return requestOrigin
       }