diff --git a/Cargo.toml b/Cargo.toml
index 6b7ec393..c7b0b8dd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -74,7 +74,7 @@ num = "0.4.0"
 enum-iterator = "2.0.0"
 getrandom = { version = "0.2", features = ["js"] }
 typed-builder = "0.18.0"
-pythonize = { version = "0.20", optional = true }
+pythonize = { version = "0.21", optional = true }
 snafu = { version = "0.8.0", features = ["backtrace"] }
 
 [dev-dependencies]