diff --git a/modules/openapi-generator/src/main/resources/python-fastapi/README.mustache b/modules/openapi-generator/src/main/resources/python-fastapi/README.mustache
index 8e6e65b7e8b..06776ba79bd 100644
--- a/modules/openapi-generator/src/main/resources/python-fastapi/README.mustache
+++ b/modules/openapi-generator/src/main/resources/python-fastapi/README.mustache
@@ -18,7 +18,7 @@ To run the server, please execute the following from the root directory:
 
 ```bash
 pip3 install -r requirements.txt
-uvicorn main:app --host 0.0.0.0 --port {{serverPort}}
+PYTHONPATH=src uvicorn openapi_server.main:app --host 0.0.0.0 --port {{serverPort}}
 ```
 
 and open your browser at `http://localhost:{{serverPort}}/docs/` to see the docs.