diff --git a/instant-segment-py/Cargo.toml b/instant-segment-py/Cargo.toml
index c2dea8b..9d9158e 100644
--- a/instant-segment-py/Cargo.toml
+++ b/instant-segment-py/Cargo.toml
@@ -18,7 +18,7 @@ crate-type = ["cdylib"]
 ahash = "0.8"
 bincode = "1.3.2"
 instant-segment = { version = "0.10", path = "../instant-segment", features = ["with-serde"] }
-pyo3 = { version = "0.18.0", features = ["extension-module"] }
+pyo3 = { version = "0.19.0", features = ["extension-module"] }
 smartstring = "1"
 
 [package.metadata.maturin]