diff --git a/pyproject.toml b/pyproject.toml
index 8ce3097c..2b3db48f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,6 +5,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "onnx-ir"
 dynamic = ["version"]
+description = "Efficient in-memory representation for ONNX"
 authors = [
     {name = "ONNX Contributors", email = "onnx-technical-discuss@lists.lfaidata.foundation"},
 ]