diff --git a/pyproject.toml b/pyproject.toml
index 6e4ead6..19b7a83 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,6 +2,7 @@
 name = "grdwindinversion"
 description="Package to perform Wind inversion from GRD Level-1 SAR images"
 readme.file = "README.rst"
+readme.content-type = 'text/x-rst'
 requires-python = ">= 3.9"
 license = {text = "MIT"}
 dependencies = [