diff --git a/setup.py b/setup.py
index fee847a..3ab4ce6 100644
--- a/setup.py
+++ b/setup.py
@@ -29,6 +29,7 @@ setup(
     maintainer_email="kanzure@gmail.com",
     description="pdf watermark remover library for academic papers",
     long_description=long_description,
+    long_description_content_type="text/markdown",
     install_requires=dependencies,
     packages=packages,
     scripts=["bin/pdfparanoia"],