diff --git a/pkgs/development/python-modules/tomlkit/default.nix b/pkgs/development/python-modules/tomlkit/default.nix
index 605291edda0b..fa978be73bbd 100644
--- a/pkgs/development/python-modules/tomlkit/default.nix
+++ b/pkgs/development/python-modules/tomlkit/default.nix
@@ -12,12 +12,12 @@
 
 buildPythonPackage rec {
   pname = "tomlkit";
-  version = "0.12.1";
+  version = "0.12.3";
   format = "pyproject";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-OOH/jtuZEnPsn2GBJEpqORrDDp9QmOdTVkDqa+l6fIY=";
+    hash = "sha256-dbr1AS0GUB8HvuW/joAbnzQ+eqxaklgfIPgM5jLmtaQ=";
   };
 
   nativeBuildInputs = [