diff --git a/pkgs/development/libraries/protobuf/29.nix b/pkgs/development/libraries/protobuf/29.nix
index 79d3af637194..5b191dcea396 100644
--- a/pkgs/development/libraries/protobuf/29.nix
+++ b/pkgs/development/libraries/protobuf/29.nix
@@ -2,8 +2,8 @@
 
 callPackage ./generic.nix (
   {
-    version = "29.2";
-    hash = "sha256-zClgj7m0JK2PNWi/1kA2L+HklzaHoT09KwnVt7Rm4ks=";
+    version = "29.3";
+    hash = "sha256-zdOBzLdN0ySrdFTF/X/NYI57kJ1ZFyoIl1/Qtgh/VkI=";
   }
   // args
 )
diff --git a/pkgs/development/python-modules/protobuf/default.nix b/pkgs/development/python-modules/protobuf/default.nix
index bbc43eecbcd8..0a12fe7bd79f 100644
--- a/pkgs/development/python-modules/protobuf/default.nix
+++ b/pkgs/development/python-modules/protobuf/default.nix
@@ -8,12 +8,12 @@
 
 buildPythonPackage rec {
   pname = "protobuf";
-  version = "5.29.2";
+  version = "5.29.3";
   pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-ssyOi7fJMmmW8OFgE3sIYfGoIWJQJljfKVEgnQywMJ4=";
+    hash = "sha256-XaD0HtrxF73jFkBLrRpIbLTt7fjkpUiRKW9kjo4HZiA=";
   };
 
   build-system = [ setuptools ];