diff --git a/server.py b/server.py
index 2d923d3..04c8f39 100644
--- a/server.py
+++ b/server.py
@@ -12,7 +12,9 @@ from rich.logging import RichHandler
 
 
 logging.basicConfig(level=logging.INFO, format="%(message)s", datefmt="[%X]", handlers=[RichHandler(markup=True)])
-app = fastapi.FastAPI()
+app = fastapi.FastAPI(
+    root_path=os.environ.get("PREVIEW_ROOT_PATH", ""),
+)
 
 MISSING_TOKEN = JSONResponse(
     {"errcode": "M_MISSING_TOKEN", "error": "Missing access token"},