diff --git a/Cargo.toml b/Cargo.toml
index 44dd349..370a65b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,7 +10,7 @@ publish = false
 lazy_static = "1.4.0"
 thiserror = "1.0.30"
 smallvec = "1.8.0"
-pyo3 = {version = "0.19.1", features = ["extension-module"], optional = true}
+pyo3 = {version = "0.20.0", features = ["extension-module"], optional = true}
 quickcheck = {version = "1.0.3", optional = true}
 serde = {version = "1.0", features = ["derive"], optional = true}