diff --git a/Cargo.toml b/Cargo.toml
index f93e325..5c96ad4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -56,7 +56,7 @@ parity-scale-codec = { version = "3", optional = true, features = [
 ], default-features = false }
 primitive-types = { version = "0.12", optional = true, default-features = false }
 proptest = { version = "1.2", optional = true, default-features = false }
-pyo3 = { version = "0.19", optional = true, default-features = false }
+pyo3 = { version = "0.24", optional = true, default-features = false }
 quickcheck = { version = "1", optional = true, default-features = false }
 rand = { version = "0.8", optional = true, default-features = false }
 rlp = { version = "0.5", optional = true, default-features = false }