diff --git a/docs/contributing.rst b/docs/contributing.rst
index 9d49a3be4..14bf41123 100644
--- a/docs/contributing.rst
+++ b/docs/contributing.rst
@@ -23,6 +23,12 @@ There are many ways to contribute to Scrapy. Here are some of them:
 Reporting bugs
 ==============
 
+.. note::
+
+    Please report security issues **only** to
+    scrapy-security@googlegroups.com. This is a private list only open to
+    trusted Scrapy developers, and its archives are not public.
+
 Well-written bug reports are very helpful, so keep in mind the following
 guidelines when reporting a new bug.