diff --git a/crates/quota-router-pyo3/Cargo.toml b/crates/quota-router-pyo3/Cargo.toml
index 893691b..6286d07 100644
--- a/crates/quota-router-pyo3/Cargo.toml
+++ b/crates/quota-router-pyo3/Cargo.toml
@@ -10,7 +10,7 @@ crate-type = ["cdylib", "rlib"]
 
 [dependencies]
 # PyO3 for Python bindings - using 0.21 with experimental async
-pyo3 = { version = "0.21", features = ["extension-module", "experimental-async"] }
+pyo3 = { version = "0.28", features = ["extension-module", "experimental-async"] }
 
 # Core library
 quota-router-core = { path = "../quota-router-core" }