diff --git a/pyproject.toml b/pyproject.toml
index f006c0c..82b666c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ version = '0.0.1'
 authors = [
   { name='Georg Pfuetzenreuter', email='georg+python@lysergic.dev' },
 ]
-readme = 'README.txt'
+readme = 'README.md'
 requires-python = '>=3.6'
 
 [tool.hatch.build.targets.pyacl]