diff --git a/gns3server/api/server.py b/gns3server/api/server.py
index b4f6e4ca..d0f14d78 100644
--- a/gns3server/api/server.py
+++ b/gns3server/api/server.py
@@ -53,22 +53,9 @@ def get_application() -> FastAPI:
         title="GNS3 controller API", description="This page describes the public controller API for GNS3", version="v3"
     )
 
-    origins = [
-        "http://127.0.0.1",
-        "http://localhost",
-        "http://localhost:4200",
-        "http://127.0.0.1:4200"
-        "http://127.0.0.1:8080",
-        "http://localhost:8080",
-        "http://127.0.0.1:3080",
-        "http://localhost:3080",
-        "http://gns3.github.io",
-        "https://gns3.github.io",
-    ]
-
     application.add_middleware(
         CORSMiddleware,
-        allow_origins=origins,
+        allow_origin_regex=r"http(s)?://(localhost|127.0.0.1)(:\d+)?",
         allow_credentials=True,
         allow_methods=["*"],
         allow_headers=["*"],