diff --git a/python/Cargo.toml b/python/Cargo.toml
index d36aae6..250821e 100644
--- a/python/Cargo.toml
+++ b/python/Cargo.toml
@@ -18,4 +18,4 @@ crate-type = ["cdylib"]
 
 [dependencies]
 fat-macho-rs = { package = "fat-macho", version = "0.4.3" }
-pyo3 = { version = "0.21.2", features = ["abi3-py37", "extension-module"] }
+pyo3 = { version = "0.22.3", features = ["abi3-py37", "extension-module"] }