diff --git a/invenio_oauthclient/ext.py b/invenio_oauthclient/ext.py
index 77c7d00..8c54dca 100644
--- a/invenio_oauthclient/ext.py
+++ b/invenio_oauthclient/ext.py
@@ -169,7 +169,6 @@ def __init__(self, app=None):
 
     def init_app(self, app):
         """Flask application initialization."""
-        self.init_config(app)
         state = _OAuthClientState(
             app,
             "OAUTHCLIENT_REMOTE_APPS",
@@ -179,24 +178,6 @@ def init_app(self, app):
         app.extensions["invenio-oauthclient"] = state
         return state
 
-    def init_config(self, app):
-        """Initialize configuration."""
-
-        @app.before_first_request
-        def override_template_configuration():
-            """Override template configuration."""
-            template_key = app.config.get(
-                "OAUTHCLIENT_TEMPLATE_KEY",
-                "SECURITY_LOGIN_USER_TEMPLATE",  # default template key
-            )
-            if template_key is not None:
-                template = app.config[template_key]  # keep the old value
-                app.config["OAUTHCLIENT_LOGIN_USER_TEMPLATE_PARENT"] = template
-                app.config[template_key] = app.config.get(
-                    "OAUTHCLIENT_LOGIN_USER_TEMPLATE",
-                    "invenio_oauthclient/login_user.html",
-                )
-
 
 class InvenioOAuthClientREST(object):
     """Invenio Oauthclient extension."""
diff --git a/invenio_oauthclient/finalize_app.py b/invenio_oauthclient/finalize_app.py
new file mode 100644
index 0000000..e3d3c34
--- /dev/null
+++ b/invenio_oauthclient/finalize_app.py
@@ -0,0 +1,30 @@
+# -*- coding: utf-8 -*-
+#
+# This file is part of Invenio.
+# Copyright (C) 2023 Graz University of Technology.
+#
+# Invenio is free software; you can redistribute it and/or modify it
+# under the terms of the MIT License; see LICENSE file for more details.
+
+"""Finalize app."""
+
+
+def finalize_app(app):
+    """Finalize app."""
+
+    override_template_configuration(app)
+
+
+def override_template_configuration(app):
+    """Override template configuration."""
+    template_key = app.config.get(
+        "OAUTHCLIENT_TEMPLATE_KEY",
+        "SECURITY_LOGIN_USER_TEMPLATE",  # default template key
+    )
+    if template_key is not None:
+        template = app.config[template_key]  # keep the old value
+        app.config["OAUTHCLIENT_LOGIN_USER_TEMPLATE_PARENT"] = template
+        app.config[template_key] = app.config.get(
+            "OAUTHCLIENT_LOGIN_USER_TEMPLATE",
+            "invenio_oauthclient/login_user.html",
+        )
diff --git a/setup.cfg b/setup.cfg
index edc5ec3..e9759d1 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -85,6 +85,8 @@ invenio_base.secret_key =
     invenio_oauthclient = invenio_oauthclient.utils:rebuild_access_tokens
 invenio_i18n.translations =
     invenio_oauthclient = invenio_oauthclient
+invenio_base.finalize_app =
+    invenio_oauthclient = invenio_oauthclient.finalize_app:finalize_app
 
 [build_sphinx]
 source-dir = docs/