diff --git a/candle-pyo3/Cargo.toml b/candle-pyo3/Cargo.toml
index 7c6fbd689f..ac7d55ee03 100644
--- a/candle-pyo3/Cargo.toml
+++ b/candle-pyo3/Cargo.toml
@@ -23,7 +23,7 @@ intel-mkl-src = { workspace = true, optional = true }
 pyo3 = { version = "0.20.0", features = ["extension-module", "abi3-py38"] }
 
 [build-dependencies]
-pyo3-build-config = "0.20"
+pyo3-build-config = "0.21"
 
 [features]
 default = []