diff --git a/nemo_gym/server_utils.py b/nemo_gym/server_utils.py
index 58562ea58..e263db430 100644
--- a/nemo_gym/server_utils.py
+++ b/nemo_gym/server_utils.py
@@ -45,7 +45,7 @@
 from fastapi import FastAPI, Request, Response
 from fastapi.exception_handlers import request_validation_exception_handler
 from fastapi.exceptions import RequestValidationError
-from fastapi.responses import JSONResponse, PlainTextResponse
+from fastapi.responses import JSONResponse
 from omegaconf import DictConfig, OmegaConf, open_dict
 from pydantic import BaseModel, ConfigDict
 from requests.exceptions import ConnectionError
@@ -548,7 +548,7 @@ class HeadServer(BaseServer):
     def setup_webserver(self) -> FastAPI:
         app = FastAPI()
 
-        app.get("/global_config_dict_yaml", response_class=PlainTextResponse)(self.global_config_dict_yaml)
+        app.get("/global_config_dict_yaml")(self.global_config_dict_yaml)
         app.get("/server_instances")(self.get_server_instances)
 
         return app