diff --git a/stac_fastapi/types/stac_fastapi/types/core.py b/stac_fastapi/types/stac_fastapi/types/core.py
index c908929d2..bc48732c5 100644
--- a/stac_fastapi/types/stac_fastapi/types/core.py
+++ b/stac_fastapi/types/stac_fastapi/types/core.py
@@ -581,9 +581,7 @@ async def landing_page(self, **kwargs) -> stac_types.LandingPage:
                 "rel": "service-desc",
                 "type": "application/vnd.oai.openapi+json;version=3.0",
                 "title": "OpenAPI service description",
-                "href": urljoin(
-                    str(request.base_url), request.app.openapi_url.lstrip("/")
-                ),
+                "href": urljoin(base_url, request.app.openapi_url.lstrip("/")),
             }
         )
 
@@ -593,9 +591,7 @@ async def landing_page(self, **kwargs) -> stac_types.LandingPage:
                 "rel": "service-doc",
                 "type": "text/html",
                 "title": "OpenAPI service documentation",
-                "href": urljoin(
-                    str(request.base_url), request.app.docs_url.lstrip("/")
-                ),
+                "href": urljoin(base_url, request.app.docs_url.lstrip("/")),
             }
         )