diff --git a/projects/ucap-webmessenger-app/tsconfig.app.json b/projects/ucap-webmessenger-app/tsconfig.app.json
index 902c0ffb..81c989a1 100644
--- a/projects/ucap-webmessenger-app/tsconfig.app.json
+++ b/projects/ucap-webmessenger-app/tsconfig.app.json
@@ -1,7 +1,7 @@
 {
   "extends": "../../tsconfig.json",
   "angularCompilerOptions": {
-    "enableIvy": true,
+    "enableIvy": false,
     "allowEmptyCodegenFiles": true
   },
   "compilerOptions": {