diff --git a/rats/pyproject.toml b/rats/pyproject.toml
index 69a7c30d..cdef44df 100644
--- a/rats/pyproject.toml
+++ b/rats/pyproject.toml
@@ -22,7 +22,7 @@ repository = "https://github.com/microsoft/rats"
 documentation = "https://microsoft.github.io/rats"
 
 [build-system]
-requires = ["uv_build>=0.11.20,<0.12.0"]
+requires = ["uv_build>=0.11.21,<0.12.0"]
 build-backend = "uv_build"
 
 [tool.uv.build-backend]