diff --git a/pkgs/development/python-modules/rtree/default.nix b/pkgs/development/python-modules/rtree/default.nix
index 71637985b810..a30e420c0589 100644
--- a/pkgs/development/python-modules/rtree/default.nix
+++ b/pkgs/development/python-modules/rtree/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
   version = "1.4.0";
   pyproject = true;
 
-  disabled = pythonOlder "3.8";
+  disabled = pythonOlder "3.9";
 
   src = fetchFromGitHub {
     owner = "Toblerity";