diff --git a/setup.cfg b/setup.cfg
index f0640e2..d22c6a8 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -2,6 +2,7 @@
 name = sigal
 description = Simple static gallery generator
 long_description = file: README.rst
+long_description_content_type = text/x-rst
 author = Simon Conseil
 author_email = contact@saimon.org
 url = https://github.com/saimn/sigal