diff --git a/railib/rest.py b/railib/rest.py
index 379142b..2b3d199 100644
--- a/railib/rest.py
+++ b/railib/rest.py
@@ -194,14 +194,14 @@ def _request_access_token(ctx: Context, url: str) -> AccessToken:
         data=data,
     )
     _print_request(req)
-    rsp = _urlopen_with_retry(req, ctx.retries)
-    result = json.loads(rsp.read())
-    token = result.get(ACCESS_KEY_TOKEN_KEY, None)
-
-    if token is not None:
-        expires_in = result.get(EXPIRES_IN_KEY, None)
-        scope = result.get(SCOPE, None)
-        return AccessToken(token, scope, expires_in)
+    with _urlopen_with_retry(req, ctx.retries) as rsp:
+        result = json.loads(rsp.read())
+        token = result.get(ACCESS_KEY_TOKEN_KEY, None)
+
+        if token is not None:
+            expires_in = result.get(EXPIRES_IN_KEY, None)
+            scope = result.get(SCOPE, None)
+            return AccessToken(token, scope, expires_in)
 
     raise Exception("failed to get the access token")