diff --git a/instant-distance-py/Cargo.toml b/instant-distance-py/Cargo.toml
index e8e3357..bc83338 100644
--- a/instant-distance-py/Cargo.toml
+++ b/instant-distance-py/Cargo.toml
@@ -17,6 +17,6 @@ crate-type = ["cdylib"]
 [dependencies]
 bincode = "1.3.1"
 instant-distance = { version = "0.6", path = "../instant-distance", features = ["with-serde"] }
-pyo3 = { version = "0.18.0", features = ["extension-module"] }
+pyo3 = { version = "0.19.0", features = ["extension-module"] }
 serde = { version = "1", features = ["derive"] }
 serde-big-array = "0.5.0"