diff --git a/pkgs/development/libraries/protobuf/33.nix b/pkgs/development/libraries/protobuf/33.nix
index 19c4fd2dd0ff..a1973638f0eb 100644
--- a/pkgs/development/libraries/protobuf/33.nix
+++ b/pkgs/development/libraries/protobuf/33.nix
@@ -2,8 +2,8 @@
 
 callPackage ./generic.nix (
   {
-    version = "33.4";
-    hash = "sha256-/mdniUtu6+tj2W8zYeV5xvEzMMfzKkGVk7Lc37p1+dE=";
+    version = "33.5";
+    hash = "sha256-bn8wMZSAqukZyo+fLT4O044ld53FvIfCdajr2WwM93E=";
   }
   // args
 )
diff --git a/pkgs/development/python-modules/protobuf/6.nix b/pkgs/development/python-modules/protobuf/6.nix
index 2d29e9f03692..1d05e4ad3346 100644
--- a/pkgs/development/python-modules/protobuf/6.nix
+++ b/pkgs/development/python-modules/protobuf/6.nix
@@ -7,14 +7,14 @@
   protobuf,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "protobuf";
-  version = "6.33.4";
+  version = "6.33.5";
   pyproject = true;
 
   src = fetchPypi {
-    inherit pname version;
-    hash = "sha256-3C5hvKOxBHDBkS0Wb+CvZ7/CDrVZcdzvjfpIzhTw7ZE=";
+    inherit (finalAttrs) pname version;
+    hash = "sha256-bdysKggfi3uWQsCUBrxqQpASj85fRxzd0WWWC7kRnlw=";
   };
 
   build-system = [ setuptools ];
@@ -26,7 +26,7 @@ buildPythonPackage rec {
   doCheck =
     # https://protobuf.dev/support/cross-version-runtime-guarantee/#backwards
     # The non-python protobuf provides the protoc binary which must not be newer.
-    assert lib.versionAtLeast version ("6." + protobuf.version);
+    assert lib.versionAtLeast finalAttrs.version ("6." + protobuf.version);
     # the pypi source archive does not ship tests
     false;
 
@@ -50,9 +50,9 @@ buildPythonPackage rec {
     description = "Protocol Buffers are Google's data interchange format";
     homepage = "https://developers.google.com/protocol-buffers/";
     changelog = "https://github.com/protocolbuffers/protobuf/releases/v${
-      builtins.substring 2 (-1) version
+      builtins.substring 2 (-1) finalAttrs.version
     }";
     license = lib.licenses.bsd3;
     maintainers = with lib.maintainers; [ GaetanLepage ];
   };
-}
+})