diff --git a/pkgs/applications/finance/odoo/default.nix b/pkgs/applications/finance/odoo/default.nix
index bd8b21aa5aa0..c755b0fb6678 100644
--- a/pkgs/applications/finance/odoo/default.nix
+++ b/pkgs/applications/finance/odoo/default.nix
@@ -1,14 +1,14 @@
 { stdenv
 , lib
 , fetchurl
-, python3
+, python39
 , nodePackages
 , wkhtmltopdf
 , nixosTests
 }:
 
 let
-  python = python3.override {
+  python = python39.override {
     packageOverrides = self: super: {
       click = super.click.overridePythonAttrs (old: rec {
         version = "7.1.2";