diff --git a/main.py b/main.py
index 740ace82b..3c3dab979 100644
--- a/main.py
+++ b/main.py
@@ -34,37 +34,40 @@ def _apply_proxy_env_vars():
     https_proxy = args.https_proxy
     no_proxy = args.no_proxy
 
-    # Fall back to settings file if CLI args are not provided.
-    if not http_proxy and not https_proxy:
-        user_dir = args.user_directory or os.path.join(
-            args.base_directory or os.path.dirname(os.path.realpath(__file__)), "user"
-        )
-        settings_path = os.path.join(user_dir, "default", "comfy.settings.json")
-        if os.path.isfile(settings_path):
-            try:
-                with open(settings_path, "r") as f:
-                    settings = _json.load(f)
-                http_proxy = http_proxy or settings.get("Comfy.Network.Proxy.HttpUrl") or ""
-                https_proxy = https_proxy or settings.get("Comfy.Network.Proxy.HttpsUrl") or ""
-                no_proxy = no_proxy or settings.get("Comfy.Network.Proxy.NoProxy") or ""
-            except Exception:
-                pass
+    # Fall back to settings file for any field not provided via CLI.
+    user_dir = args.user_directory or os.path.join(
+        args.base_directory or os.path.dirname(os.path.realpath(__file__)), "user"
+    )
+    settings_path = os.path.join(user_dir, "default", "comfy.settings.json")
+    if os.path.isfile(settings_path):
+        try:
+            with open(settings_path, "r") as f:
+                settings = _json.load(f)
+            http_proxy = http_proxy or settings.get("Comfy.Network.Proxy.HttpUrl") or ""
+            https_proxy = https_proxy or settings.get("Comfy.Network.Proxy.HttpsUrl") or ""
+            no_proxy = no_proxy or settings.get("Comfy.Network.Proxy.NoProxy") or ""
+        except Exception:
+            pass
+
+    def _set_proxy_var(name, value):
+        """Set env var, overriding inherited values when explicitly configured."""
+        os.environ[name] = value
 
     if http_proxy:
-        os.environ.setdefault('HTTP_PROXY', http_proxy)
-        os.environ.setdefault('http_proxy', http_proxy)
+        _set_proxy_var('HTTP_PROXY', http_proxy)
+        _set_proxy_var('http_proxy', http_proxy)
         # Use http_proxy for HTTPS too unless https_proxy is explicitly set
         if not https_proxy:
-            os.environ.setdefault('HTTPS_PROXY', http_proxy)
-            os.environ.setdefault('https_proxy', http_proxy)
+            _set_proxy_var('HTTPS_PROXY', http_proxy)
+            _set_proxy_var('https_proxy', http_proxy)
         logging.info("HTTP proxy configured: %s", http_proxy)
     if https_proxy:
-        os.environ.setdefault('HTTPS_PROXY', https_proxy)
-        os.environ.setdefault('https_proxy', https_proxy)
+        _set_proxy_var('HTTPS_PROXY', https_proxy)
+        _set_proxy_var('https_proxy', https_proxy)
         logging.info("HTTPS proxy configured: %s", https_proxy)
     if no_proxy:
-        os.environ.setdefault('NO_PROXY', no_proxy)
-        os.environ.setdefault('no_proxy', no_proxy)
+        _set_proxy_var('NO_PROXY', no_proxy)
+        _set_proxy_var('no_proxy', no_proxy)
 
 
 if __name__ == "__main__":