diff --git a/Cargo.toml b/Cargo.toml
index 1c516a2e3..e5143afad 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,7 +25,7 @@ path = "src/lib.rs"
 [dependencies]
 thiserror = "1.0.28"
 portgraph = { version = "0.9.0", features = ["serde", "petgraph"] }
-pyo3 = { version = "0.19.0", optional = true, features = [
+pyo3 = { version = "0.20.0", optional = true, features = [
     "multiple-pymethods",
 ] }
 regex = "1.9.5"