diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 0bd217ad4ee1..a4ecbcba3c28 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -12904,9 +12904,7 @@ self: super: with self; {
 
   skidl = callPackage ../development/python-modules/skidl { };
 
-  skl2onnx = callPackage ../development/python-modules/skl2onnx {
-    protobuf = protobuf3;
-  };
+  skl2onnx = callPackage ../development/python-modules/skl2onnx { };
 
   sklearn-deap = callPackage ../development/python-modules/sklearn-deap { };