diff --git a/setup.py b/setup.py
index 1521172..49146ef 100644
--- a/setup.py
+++ b/setup.py
@@ -31,6 +31,7 @@ def read(fname):
     keywords=["tkinter", "ttk", "gui", "tcl", "theme"],
     license="GPLv3",
     long_description=read("README.md"),
+    long_description_content_type="text/markdown",
     classifiers=[
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",