diff --git a/pyproject.toml b/pyproject.toml
index f6d021717b76fff47307910dc8c1493a6176017e..8a57cc89cbf94eef5cc9b97951d242c89bead89d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -63,7 +63,7 @@
     package-dir = {"" = "src"}
 
 [tool.setuptools.dynamic]
-    readme = {file = "README.md"}
+    readme = {file = "README.md", content-type = "text/markdown"}
 
 [project.entry-points."bob.cli"]
     measure  = "bob.measure.script.measure:measure"