diff --git a/pyproject.toml b/pyproject.toml
index 0c57a7f8..e402e7c4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,6 +35,7 @@ Homepage = "https://github.com/googleapis/genai-toolbox-langchain-python"
 Repository = "https://github.com/googleapis/genai-toolbox-langchain-python.git"
 "Bug Tracker" = "https://github.com/googleapis/genai-toolbox-langchain-python/issues"
 Changelog = "https://github.com/googleapis/genai-toolbox-langchain-python/blob/main/CHANGELOG.md"
+readme = "README.md"
 
 [project.optional-dependencies]
 test = [