diff --git a/app/main.py b/app/main.py
index 0e1163d..faf00fb 100644
--- a/app/main.py
+++ b/app/main.py
@@ -37,8 +37,12 @@ async def lifespan(_: FastAPI):
 
 
 def main() -> None:  # pragma: no cover
-    os.environ["HTTP_PROXY"] = str(config.http_proxy)
-    os.environ["HTTPS_PROXY"] = str(config.http_proxy)
+    if config.http_proxy:
+        os.environ["HTTP_PROXY"] = str(config.http_proxy)
+        os.environ["HTTPS_PROXY"] = str(config.http_proxy)
+    else:
+        os.environ.pop("HTTP_PROXY", None)
+        os.environ.pop("HTTPS_PROXY", None)
 
     uvicorn.run(
         "app.main:app",
diff --git a/app/test_main.py b/app/test_main.py
index 8d846ce..7472ea5 100644
--- a/app/test_main.py
+++ b/app/test_main.py
@@ -71,5 +71,5 @@ def test_main_no_proxy_in_config(mocker, monkeypatch):
 
     main_mod.main()
 
-    assert os.environ.get("HTTP_PROXY") == "None"
-    assert os.environ.get("HTTPS_PROXY") == "None"
+    assert os.environ.get("HTTP_PROXY") is None
+    assert os.environ.get("HTTPS_PROXY") is None