diff --git a/setup.py b/setup.py
index 5e6a3b2d..dfcf4d4e 100644
--- a/setup.py
+++ b/setup.py
@@ -20,7 +20,7 @@
 
     description='''An extension to enable Single Sign On(SSO) for CKAN data portals via SAML2 Authentication.''',
     long_description=long_description,
-    long_description_content_type='text/x-rst',
+    long_description_content_type='text/markdown',
 
     # The project's main homepage.
     url='https://github.com/keitaroinc/'\