diff --git a/pkgs/development/python-modules/robot-descriptions/default.nix b/pkgs/development/python-modules/robot-descriptions/default.nix
index 065048ea3aca..c9ca5b5e2886 100644
--- a/pkgs/development/python-modules/robot-descriptions/default.nix
+++ b/pkgs/development/python-modules/robot-descriptions/default.nix
@@ -16,14 +16,14 @@
 
 buildPythonPackage rec {
   pname = "robot-descriptions";
-  version = "1.20.0";
+  version = "1.21.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "robot-descriptions";
     repo = "robot_descriptions.py";
     tag = "v${version}";
-    hash = "sha256-8SBzhkENpUodnfObekkMPUsTQr/8mz27v3PK0S3IKO0=";
+    hash = "sha256-/NH9OaqWVzQ3XSLEJTLlpfeCmF1Iw2ItfyOIO3LuPT4=";
   };
 
   build-system = [