diff --git a/jupyterlab_server/handlers.py b/jupyterlab_server/handlers.py
index 79df953..ca95e73 100644
--- a/jupyterlab_server/handlers.py
+++ b/jupyterlab_server/handlers.py
@@ -82,6 +82,12 @@ def get_page_config(self) -> dict[str, Any]:
         server_root = self.settings.get("server_root_dir", "")
         server_root = server_root.replace(os.sep, "/")
         base_url = self.settings.get("base_url")
+        server_app = self.settings.get("serverapp")
+        assert server_app is not None
+        if hasattr(server_app, "allow_insecure_kernelspec_params"):
+            allow_insecure_kernelspec_params = server_app.allow_insecure_kernelspec_params
+        else:
+            allow_insecure_kernelspec_params = False
 
         # Remove the trailing slash for compatibility with html-webpack-plugin.
         full_static_url = self.static_url_prefix.rstrip("/")
@@ -91,6 +97,7 @@ def get_page_config(self) -> dict[str, Any]:
         page_config.setdefault("ignorePlugins", [])
         page_config.setdefault("serverRoot", server_root)
         page_config["store_id"] = self.application.store_id  # type:ignore[attr-defined]
+        page_config.setdefault("allow_insecure_kernelspec_params", allow_insecure_kernelspec_params)
 
         server_root = os.path.normpath(os.path.expanduser(server_root))
         preferred_path = ""
diff --git a/tests/test_labapp.py b/tests/test_labapp.py
index d7e39dd..9a2c17e 100644
--- a/tests/test_labapp.py
+++ b/tests/test_labapp.py
@@ -60,6 +60,7 @@ def ispath(p):
 
     nondirs = {k: v for k, v in page_config.items() if not ispath(k)}
     assert nondirs == {
+        "allow_insecure_kernelspec_params": False,
         "appName": "JupyterLab Server Application",
         "appNamespace": "jupyterlab_server",
         "appUrl": "/lab",