diff --git a/script/lib/github.py b/script/lib/github.py
index 6b9528bc34d..3aa75c62793 100644
--- a/script/lib/github.py
+++ b/script/lib/github.py
@@ -16,6 +16,7 @@ class GitHub:
     if not 'headers' in kw:
       kw['headers'] = dict()
     kw['headers']['Authorization'] = self._authorization
+    kw['headers']['Accept'] = 'application/vnd.github.manifold-preview'
 
     return getattr(requests, method)(url, **kw)