diff --git a/crates/processing_pyo3/pyproject.toml b/crates/processing_pyo3/pyproject.toml
index 24526db..e0c188b 100644
--- a/crates/processing_pyo3/pyproject.toml
+++ b/crates/processing_pyo3/pyproject.toml
@@ -17,3 +17,10 @@ dev = ["maturin>=1.10,<2.0"]
 
 [tool.maturin]
 manifest-path = "Cargo.toml"
+
+[tool.uv]
+cache-keys = [
+    { file = "pyproject.toml" },
+    { file = "Cargo.toml" },
+    { file = "src/**/*.rs" },
+]