diff --git a/protobuf_deps.bzl b/protobuf_deps.bzl
index 27315ca3d2..efa0ccd381 100644
--- a/protobuf_deps.bzl
+++ b/protobuf_deps.bzl
@@ -150,7 +150,6 @@ def protobuf_deps():
         _github_archive(
             name = "upb",
             repo = "https://github.com/protocolbuffers/upb",
-            commit = "56a770818cf47f8ac9e2ac1585a8d2b764214479",
-            sha256 = "",
+            commit = "0ea9f73be35e35db242ccc65aa9c87487b792324",
             patches = ["@com_google_protobuf//build_defs:upb.patch"],
         )
diff --git a/python/google/protobuf/internal/containers.py b/python/google/protobuf/internal/containers.py
index 29fbb53d2f..4884e2878b 100755
--- a/python/google/protobuf/internal/containers.py
+++ b/python/google/protobuf/internal/containers.py
@@ -159,17 +159,17 @@ class RepeatedScalarFieldContainer(BaseContainer[_T], MutableSequence[_T]):
 
   def extend(self, elem_seq: Iterable[_T]) -> None:
     """Extends by appending the given iterable. Similar to list.extend()."""
+# TODO(b/286557203): Change OSS to raise error too
     if elem_seq is None:
       return
     try:
       elem_seq_iter = iter(elem_seq)
     except TypeError:
       if not elem_seq:
-        # silently ignore falsy inputs :-/.
-        # TODO(ptucker): Deprecate this behavior. b/18413862
+        warnings.warn('Value is not iterable. Please remove the wrong '
+                      'usage. This will be changed to raise TypeError soon.')
         return
       raise
-
     new_values = [self._type_checker.CheckValue(elem) for elem in elem_seq_iter]
     if new_values:
       self._values.extend(new_values)
diff --git a/python/google/protobuf/internal/message_test.py b/python/google/protobuf/internal/message_test.py
index a05c88af97..f75fbdead7 100755
--- a/python/google/protobuf/internal/message_test.py
+++ b/python/google/protobuf/internal/message_test.py
@@ -1005,47 +1005,36 @@ class MessageTest(unittest.TestCase):
     with self.assertRaises(NameError) as _:
       m.repeated_nested_enum.extend(a for i in range(10))  # pylint: disable=undefined-variable
 
-  FALSY_VALUES = [None, False, 0, 0.0, b'', u'', bytearray(), [], {}, set()]
+  FALSY_VALUES = [None, False, 0, 0.0]
+  EMPTY_VALUES = [b'', u'', bytearray(), [], {}, set()]
 
   def testExtendInt32WithNothing(self, message_module):
     """Test no-ops extending repeated int32 fields."""
     m = message_module.TestAllTypes()
     self.assertSequenceEqual([], m.repeated_int32)
 
-    # TODO(ptucker): Deprecate this behavior. b/18413862
-    for falsy_value in MessageTest.FALSY_VALUES:
-      m.repeated_int32.extend(falsy_value)
+    for empty_value in MessageTest.EMPTY_VALUES:
+      m.repeated_int32.extend(empty_value)
       self.assertSequenceEqual([], m.repeated_int32)
 
-    m.repeated_int32.extend([])
-    self.assertSequenceEqual([], m.repeated_int32)
-
   def testExtendFloatWithNothing(self, message_module):
     """Test no-ops extending repeated float fields."""
     m = message_module.TestAllTypes()
     self.assertSequenceEqual([], m.repeated_float)
 
-    # TODO(ptucker): Deprecate this behavior. b/18413862
-    for falsy_value in MessageTest.FALSY_VALUES:
-      m.repeated_float.extend(falsy_value)
+    for empty_value in MessageTest.EMPTY_VALUES:
+      m.repeated_float.extend(empty_value)
       self.assertSequenceEqual([], m.repeated_float)
 
-    m.repeated_float.extend([])
-    self.assertSequenceEqual([], m.repeated_float)
-
   def testExtendStringWithNothing(self, message_module):
     """Test no-ops extending repeated string fields."""
     m = message_module.TestAllTypes()
     self.assertSequenceEqual([], m.repeated_string)
 
-    # TODO(ptucker): Deprecate this behavior. b/18413862
-    for falsy_value in MessageTest.FALSY_VALUES:
-      m.repeated_string.extend(falsy_value)
+    for empty_value in MessageTest.EMPTY_VALUES:
+      m.repeated_string.extend(empty_value)
       self.assertSequenceEqual([], m.repeated_string)
 
-    m.repeated_string.extend([])
-    self.assertSequenceEqual([], m.repeated_string)
-
   def testExtendInt32WithPythonList(self, message_module):
     """Test extending repeated int32 fields with python lists."""
     m = message_module.TestAllTypes()
diff --git a/python/google/protobuf/pyext/repeated_scalar_container.cc b/python/google/protobuf/pyext/repeated_scalar_container.cc
index 8cf236bf7a..05ff04471c 100644
--- a/python/google/protobuf/pyext/repeated_scalar_container.cc
+++ b/python/google/protobuf/pyext/repeated_scalar_container.cc
@@ -466,11 +466,17 @@ static int AssSubscript(PyObject* pself, PyObject* slice, PyObject* value) {
 PyObject* Extend(RepeatedScalarContainer* self, PyObject* value) {
   cmessage::AssureWritable(self->parent);
 
-  // TODO(ptucker): Deprecate this behavior. b/18413862
+  // TODO(b/286557203): Remove this in OSS
   if (value == Py_None) {
+    PyErr_Warn(nullptr,
+               "Value is not iterable. Please remove the wrong usage."
+               " This will be changed to raise TypeError soon.");
     Py_RETURN_NONE;
   }
   if ((Py_TYPE(value)->tp_as_sequence == nullptr) && PyObject_Not(value)) {
+    PyErr_Warn(nullptr,
+               "Value is not iterable. Please remove the wrong usage."
+               " This will be changed to raise TypeError soon.");
     Py_RETURN_NONE;
   }