diff --git a/backend/capellacollab/__main__.py b/backend/capellacollab/__main__.py
index f26c124ee..a96820ea4 100644
--- a/backend/capellacollab/__main__.py
+++ b/backend/capellacollab/__main__.py
@@ -15,7 +15,6 @@
 import capellacollab.projects.toolmodels.backups.runs.interface as pipeline_runs_interface
 import capellacollab.sessions.metrics as sessions_metrics
 import capellacollab.settings.modelsources.t4c.license_server.metrics as t4c_metrics
-from capellacollab import core
 
 # This import statement is required and should not be removed! (Alembic will not work otherwise)
 from capellacollab.config import config
@@ -42,12 +41,9 @@
     handlers=[stream_handler, timed_rotating_file_handler],
 )
 
-ALLOW_ORIGINS = (
-    [f"{config.general.scheme}//{config.general.host}:{config.general.port}"]
-    + ["http://localhost:4200", "http://127.0.0.1:4200"]
-    if core.DEVELOPMENT_MODE
-    else []
-)
+ALLOW_ORIGINS = [
+    f"{config.general.scheme}://{config.general.host}:{config.general.port}"
+]
 
 
 async def startup():
diff --git a/backend/capellacollab/config/models.py b/backend/capellacollab/config/models.py
index fdb199bd7..95424f8ea 100644
--- a/backend/capellacollab/config/models.py
+++ b/backend/capellacollab/config/models.py
@@ -192,7 +192,7 @@ class GeneralConfig(BaseConfig):
         examples=["localhost", "capella.example.com"],
     )
     port: int | str = pydantic.Field(
-        default=8000,
+        default=4200,
         description="The port the application should run on.",
         examples=[8000, 443, 8080],
     )
diff --git a/backend/capellacollab/core/database/migration.py b/backend/capellacollab/core/database/migration.py
index 87943515e..c781289f3 100644
--- a/backend/capellacollab/core/database/migration.py
+++ b/backend/capellacollab/core/database/migration.py
@@ -11,7 +11,6 @@
 from alembic import migration
 from sqlalchemy import orm
 
-from capellacollab import core
 from capellacollab.config import config
 from capellacollab.core import database
 from capellacollab.events import crud as events_crud
@@ -156,11 +155,7 @@ def get_eclipse_session_configuration() -> (
                     environment={
                         "CONNECTION_METHOD": "xpra",
                         "XPRA_SUBPATH": "{CAPELLACOLLAB_SESSIONS_BASE_PATH}",
-                        "XPRA_CSP_ORIGIN_HOST": (
-                            "http://localhost:4200"
-                            if core.DEVELOPMENT_MODE
-                            else "{CAPELLACOLLAB_ORIGIN_BASE_URL}"
-                        ),
+                        "XPRA_CSP_ORIGIN_HOST": "{CAPELLACOLLAB_ORIGIN_BASE_URL}",
                     },
                     redirect_url="{CAPELLACOLLAB_SESSIONS_SCHEME}://{CAPELLACOLLAB_SESSIONS_HOST}:{CAPELLACOLLAB_SESSIONS_PORT}{CAPELLACOLLAB_SESSIONS_BASE_PATH}/?floating_menu=0&sharing=1&path={CAPELLACOLLAB_SESSIONS_BASE_PATH}/",
                     cookies={
@@ -277,11 +272,7 @@ def create_jupyter_tool(db: orm.Session) -> tools_models.DatabaseTool:
             environment={
                 "JUPYTER_PORT": "8888",
                 "JUPYTER_TOKEN": "{CAPELLACOLLAB_SESSION_TOKEN}",
-                "CSP_ORIGIN_HOST": (
-                    "http://localhost:4200"
-                    if core.DEVELOPMENT_MODE
-                    else "{CAPELLACOLLAB_ORIGIN_BASE_URL}"
-                ),
+                "CSP_ORIGIN_HOST": "{CAPELLACOLLAB_ORIGIN_BASE_URL}",
                 "JUPYTER_BASE_URL": "{CAPELLACOLLAB_SESSIONS_BASE_PATH}",
             },
             connection=tools_models.ToolSessionConnection(