diff --git a/pkgs/development/python-modules/pycrdt-websocket/default.nix b/pkgs/development/python-modules/pycrdt-websocket/default.nix
index a0e060b1bf2a..f713b194f79a 100644
--- a/pkgs/development/python-modules/pycrdt-websocket/default.nix
+++ b/pkgs/development/python-modules/pycrdt-websocket/default.nix
@@ -18,7 +18,7 @@
 
 buildPythonPackage rec {
   pname = "pycrdt-websocket";
-  version = "0.13.3";
+  version = "0.13.4";
   pyproject = true;
 
   disabled = pythonOlder "3.8";
@@ -27,7 +27,7 @@ buildPythonPackage rec {
     owner = "jupyter-server";
     repo = "pycrdt-websocket";
     rev = "refs/tags/v${version}";
-    hash = "sha256-4kxPRPb8XfbQHYmQqnSNfqywUZxQy5b0qWIryLDtP8w=";
+    hash = "sha256-nkm1ZQ6bYBRDDoREovhEthDZoHApYxzAnwVgDgpWW/s=";
   };
 
   build-system = [