diff --git a/bazel/workspace_deps.bzl b/bazel/workspace_deps.bzl
index cfe532efb1..2d004d0c2a 100644
--- a/bazel/workspace_deps.bzl
+++ b/bazel/workspace_deps.bzl
@@ -23,8 +23,8 @@ def upb_deps():
         _github_archive,
         name = "com_google_protobuf",
         repo = "https://github.com/protocolbuffers/protobuf",
-        commit = "e202f31b78a9189fbebe25c3cae8e7a1733d6316",
-        sha256 = "fc2eb31c2fef530c305dad5c4b38b3afcd90dd3955368c1acab8cfe38b7ecb03",
+        commit = "65e047d098bfdbed787b39d8facc0b74cf3cff73",
+        sha256 = "807c22ebfb865aa35c17bae77b8f8ecc19c9509c122dbc36f6262cb3c83f1f3c",
         patches = ["@upb//bazel:protobuf.patch"],
     )
 
diff --git a/python/message.c b/python/message.c
index cc5bd77dfc..0e42a9884c 100644
--- a/python/message.c
+++ b/python/message.c
@@ -1601,6 +1601,19 @@ static PyObject* PyUpb_Message_WhichOneof(PyObject* _self, PyObject* name) {
   return PyUnicode_FromString(upb_FieldDef_Name(f));
 }
 
+PyObject* DeepCopy(PyObject* _self, PyObject* arg) {
+  PyUpb_Message* self = (void*)_self;
+
+  PyObject* arena = PyUpb_Arena_New();
+  upb_Message* clone =
+      upb_Message_DeepClone(self->ptr.msg, upb_MessageDef_MiniTable(self->def),
+                            PyUpb_Arena_Get(arena));
+  PyObject* ret = PyUpb_Message_Get(clone, self->def, arena);
+  Py_DECREF(arena);
+
+  return ret;
+}
+
 void PyUpb_Message_ClearExtensionDict(PyObject* _self) {
   PyUpb_Message* self = (void*)_self;
   assert(self->ext_dict);
@@ -1630,9 +1643,9 @@ static PyGetSetDef PyUpb_Message_Getters[] = {
     {NULL}};
 
 static PyMethodDef PyUpb_Message_Methods[] = {
+    {"__deepcopy__", (PyCFunction)DeepCopy, METH_VARARGS,
+     "Makes a deep copy of the class."},
     // TODO(https://github.com/protocolbuffers/upb/issues/459)
-    //{ "__deepcopy__", (PyCFunction)DeepCopy, METH_VARARGS,
-    //  "Makes a deep copy of the class." },
     //{ "__unicode__", (PyCFunction)ToUnicode, METH_NOARGS,
     //  "Outputs a unicode representation of the message." },
     {"ByteSize", (PyCFunction)PyUpb_Message_ByteSize, METH_NOARGS,