diff --git a/README.rst b/README.rst
index f02c1b9..0632c03 100644
--- a/README.rst
+++ b/README.rst
@@ -32,6 +32,9 @@ ProtoSym
    :target: https://github.com/psf/black
    :alt: Black
 
+Our mailing list is at https://groups.google.com/forum/?fromgroups#!forum/sympy.
+
+Feel free to ask us anything there. We have a very welcoming and helpful community.
 
 Features
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