diff --git a/src/environments/environment.build.ts b/src/environments/environment.build.ts
index fadca5cacaff76d86fd63e8e9a5589b73066a515..52e9d22d163bc4fc2c7fe7adda8652071d64e6a2 100644
--- a/src/environments/environment.build.ts
+++ b/src/environments/environment.build.ts
@@ -4,5 +4,5 @@ export const environment = {
   production: false,
   testcenterUrl: '/',
   appPublisher: 'IQB - Institut zur Qualitätsentwicklung im Bildungswesen',
-  apiVersionExpected: '3.0.1'
+  apiVersionExpected: '4.0.0'
 };
diff --git a/src/environments/environment.prod.ts b/src/environments/environment.prod.ts
index 857f58eb235c6ca8d727c2158555920c31022139..c7cfe2f7f62011eb614bd75fb5b60e98badd7788 100644
--- a/src/environments/environment.prod.ts
+++ b/src/environments/environment.prod.ts
@@ -4,5 +4,5 @@ export const environment = {
   production: true,
   testcenterUrl: '/api/',
   appPublisher: 'IQB - Institut zur Qualitätsentwicklung im Bildungswesen',
-  apiVersionExpected: '3.0.1'
+  apiVersionExpected: '4.0.0'
 };