diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index ba5c05253752..b4b3090c64a6 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -174,7 +174,9 @@ supported:
 * `requires` (optional): A list of other stub packages or packages with type
   information that are imported by the stubs in this package. Only packages
   generated by typeshed or required by the upstream package are allowed to
-  be listed here, for security reasons.
+  be listed here, for security reasons. See
+  [this issue](https://github.com/typeshed-internal/stub_uploader/issues/90)
+  for more information about what external dependecies are allowed.
 * `extra_description` (optional): Can be used to add a custom description to
   the package's long description. It should be a multi-line string in
   Markdown format.