diff --git a/Cargo.toml b/Cargo.toml
index 605ae65..e967ce1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,9 +4,9 @@
 
 [package]
 name = "libreda-python"
-version = "0.0.3"
+version = "0.0.4"
 authors = ["Thomas Kramer <code@tkramer.ch>"]
-edition = "2018"
+edition = "2021"
 license = "AGPL-3.0-or-later"
 description = "Python binding for the LibrEDA database."
 keywords = ["vlsi", "python"]
@@ -19,7 +19,7 @@ name = "libreda"
 crate-type = ["cdylib"]
 
 [dependencies.pyo3]
-version = "0.18"
+version = "0.20"
 features = ["extension-module"]
 
 [dependencies]