diff --git a/Cargo.toml b/Cargo.toml
index 5e84f12..6eb5fd2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,7 +12,7 @@ documentation = "https://docs.rs/crate/pythonize/"
 
 [dependencies]
 serde = { version = "1.0", default-features = false }
-pyo3 = { version = "0.12", default-features = false }
+pyo3 = { version = "0.14", default-features = false }
 
 [dev-dependencies]
 serde = { version = "1.0", features = ["derive"] }