diff --git a/pkgs/development/python-modules/ujson/default.nix b/pkgs/development/python-modules/ujson/default.nix
index 295d6febf33..9df71ee49c3 100644
--- a/pkgs/development/python-modules/ujson/default.nix
+++ b/pkgs/development/python-modules/ujson/default.nix
@@ -8,12 +8,12 @@
 
 buildPythonPackage rec {
   pname = "ujson";
-  version = "3.0.0";
+  version = "3.1.0";
   disabled = isPyPy || (!isPy3k);
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "e0199849d61cc6418f94d52a314c6a27524d65e82174d2a043fb718f73d1520d";
+    sha256 = "00bda1de275ed6fe81817902189c75dfd156b4fa29b44dc1f4620775d2f50cf7";
   };
 
   nativeBuildInputs = [ setuptools_scm ];