diff --git a/instant-distance-py/Cargo.toml b/instant-distance-py/Cargo.toml
index c42ff1e..dadd01e 100644
--- a/instant-distance-py/Cargo.toml
+++ b/instant-distance-py/Cargo.toml
@@ -17,7 +17,7 @@ crate-type = ["cdylib"]
 [dependencies]
 bincode = "1.3.1"
 instant-distance = { version = "0.5", path = "../instant-distance", features = ["with-serde"] }
-pyo3 = { version = "0.14.1", features = ["extension-module"] }
+pyo3 = { version = "0.15", features = ["extension-module"] }
 serde = { version = "1", features = ["derive"] }
 serde-big-array = "0.3.2"