diff --git a/Cargo.toml b/Cargo.toml
index 081e300..175b138 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,7 +21,7 @@ serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 uuid = { version = "1.4", features = ["serde"] }
 pyo3 = { version = "0.19.0", optional = true }
-pythonize = { version = "0.19.0", optional = true }
+pythonize = { version = "0.20.0", optional = true }
 
 
 [features]