diff --git a/pkgs/development/python-modules/btrees/default.nix b/pkgs/development/python-modules/btrees/default.nix
index 8e25d0bd94d2..9213248b67cb 100644
--- a/pkgs/development/python-modules/btrees/default.nix
+++ b/pkgs/development/python-modules/btrees/default.nix
@@ -12,12 +12,12 @@
 
 buildPythonPackage rec {
   pname = "btrees";
-  version = "6.2";
+  version = "6.3";
   pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-SnxwN2aEfrD6tYrpudacyAWIy/1uNFcrur1FU+B5/is=";
+    hash = "sha256-Fga9/6erKMaACYRUC2le7oSPbhWwFF2Fj/SwxiZOjtI=";
   };
 
   build-system = [ setuptools ];