diff --git a/common.gypi b/common.gypi
index 4da032d0723a5c..25c34fc477c4ec 100644
--- a/common.gypi
+++ b/common.gypi
@@ -29,7 +29,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.8',
+    'v8_embedder_string': '-node.9',
 
     # Enable disassembler for `--print-code` v8 options
     'v8_enable_disassembler': 1,
diff --git a/deps/v8/src/compiler/js-call-reducer.cc b/deps/v8/src/compiler/js-call-reducer.cc
index 2acdf0945efc5e..45664593c5f3c8 100644
--- a/deps/v8/src/compiler/js-call-reducer.cc
+++ b/deps/v8/src/compiler/js-call-reducer.cc
@@ -3551,10 +3551,6 @@ Reduction JSCallReducer::ReduceJSCall(Node* node,
       return ReduceAsyncFunctionPromiseCreate(node);
     case Builtins::kAsyncFunctionPromiseRelease:
       return ReduceAsyncFunctionPromiseRelease(node);
-    case Builtins::kPromiseCapabilityDefaultReject:
-      return ReducePromiseCapabilityDefaultReject(node);
-    case Builtins::kPromiseCapabilityDefaultResolve:
-      return ReducePromiseCapabilityDefaultResolve(node);
     case Builtins::kPromiseInternalConstructor:
       return ReducePromiseInternalConstructor(node);
     case Builtins::kPromiseInternalReject:
@@ -5310,120 +5306,6 @@ Reduction JSCallReducer::ReduceAsyncFunctionPromiseRelease(Node* node) {
   return Replace(value);
 }
 
-// ES section #sec-promise-reject-functions
-Reduction JSCallReducer::ReducePromiseCapabilityDefaultReject(Node* node) {
-  DCHECK_EQ(IrOpcode::kJSCall, node->opcode());
-  Node* target = NodeProperties::GetValueInput(node, 0);
-  Node* resolution = node->op()->ValueInputCount() > 2
-                         ? NodeProperties::GetValueInput(node, 2)
-                         : jsgraph()->UndefinedConstant();
-  Node* frame_state = NodeProperties::GetFrameStateInput(node);
-  Node* effect = NodeProperties::GetEffectInput(node);
-  Node* control = NodeProperties::GetControlInput(node);
-
-  // We need to execute in the {target}s context.
-  Node* context = effect = graph()->NewNode(
-      simplified()->LoadField(AccessBuilder::ForJSFunctionContext()), target,
-      effect, control);
-
-  // Grab the promise closed over by {target}.
-  Node* promise = effect =
-      graph()->NewNode(simplified()->LoadField(AccessBuilder::ForContextSlot(
-                           PromiseBuiltinsAssembler::kPromiseSlot)),
-                       context, effect, control);
-
-  // Check if the {promise} is still pending or already settled.
-  Node* check = graph()->NewNode(simplified()->ReferenceEqual(), promise,
-                                 jsgraph()->UndefinedConstant());
-  Node* branch =
-      graph()->NewNode(common()->Branch(BranchHint::kFalse), check, control);
-
-  Node* if_true = graph()->NewNode(common()->IfTrue(), branch);
-  Node* etrue = effect;
-
-  Node* if_false = graph()->NewNode(common()->IfFalse(), branch);
-  Node* efalse = effect;
-  {
-    // Mark the {promise} as settled.
-    efalse = graph()->NewNode(
-        simplified()->StoreField(AccessBuilder::ForContextSlot(
-            PromiseBuiltinsAssembler::kPromiseSlot)),
-        context, jsgraph()->UndefinedConstant(), efalse, if_false);
-
-    // Check if we should emit a debug event.
-    Node* debug_event = efalse =
-        graph()->NewNode(simplified()->LoadField(AccessBuilder::ForContextSlot(
-                             PromiseBuiltinsAssembler::kDebugEventSlot)),
-                         context, efalse, if_false);
-
-    // Actually reject the {promise}.
-    efalse =
-        graph()->NewNode(javascript()->RejectPromise(), promise, resolution,
-                         debug_event, context, frame_state, efalse, if_false);
-  }
-
-  control = graph()->NewNode(common()->Merge(2), if_true, if_false);
-  effect = graph()->NewNode(common()->EffectPhi(2), etrue, efalse, control);
-
-  Node* value = jsgraph()->UndefinedConstant();
-  ReplaceWithValue(node, value, effect, control);
-  return Replace(value);
-}
-
-// ES section #sec-promise-resolve-functions
-Reduction JSCallReducer::ReducePromiseCapabilityDefaultResolve(Node* node) {
-  DCHECK_EQ(IrOpcode::kJSCall, node->opcode());
-  Node* target = NodeProperties::GetValueInput(node, 0);
-  Node* resolution = node->op()->ValueInputCount() > 2
-                         ? NodeProperties::GetValueInput(node, 2)
-                         : jsgraph()->UndefinedConstant();
-  Node* frame_state = NodeProperties::GetFrameStateInput(node);
-  Node* effect = NodeProperties::GetEffectInput(node);
-  Node* control = NodeProperties::GetControlInput(node);
-
-  // We need to execute in the {target}s context.
-  Node* context = effect = graph()->NewNode(
-      simplified()->LoadField(AccessBuilder::ForJSFunctionContext()), target,
-      effect, control);
-
-  // Grab the promise closed over by {target}.
-  Node* promise = effect =
-      graph()->NewNode(simplified()->LoadField(AccessBuilder::ForContextSlot(
-                           PromiseBuiltinsAssembler::kPromiseSlot)),
-                       context, effect, control);
-
-  // Check if the {promise} is still pending or already settled.
-  Node* check = graph()->NewNode(simplified()->ReferenceEqual(), promise,
-                                 jsgraph()->UndefinedConstant());
-  Node* branch =
-      graph()->NewNode(common()->Branch(BranchHint::kFalse), check, control);
-
-  Node* if_true = graph()->NewNode(common()->IfTrue(), branch);
-  Node* etrue = effect;
-
-  Node* if_false = graph()->NewNode(common()->IfFalse(), branch);
-  Node* efalse = effect;
-  {
-    // Mark the {promise} as settled.
-    efalse = graph()->NewNode(
-        simplified()->StoreField(AccessBuilder::ForContextSlot(
-            PromiseBuiltinsAssembler::kPromiseSlot)),
-        context, jsgraph()->UndefinedConstant(), efalse, if_false);
-
-    // Actually resolve the {promise}.
-    efalse =
-        graph()->NewNode(javascript()->ResolvePromise(), promise, resolution,
-                         context, frame_state, efalse, if_false);
-  }
-
-  control = graph()->NewNode(common()->Merge(2), if_true, if_false);
-  effect = graph()->NewNode(common()->EffectPhi(2), etrue, efalse, control);
-
-  Node* value = jsgraph()->UndefinedConstant();
-  ReplaceWithValue(node, value, effect, control);
-  return Replace(value);
-}
-
 Node* JSCallReducer::CreateArtificialFrameState(
     Node* node, Node* outer_frame_state, int parameter_count,
     BailoutId bailout_id, FrameStateType frame_state_type,
diff --git a/deps/v8/src/compiler/js-call-reducer.h b/deps/v8/src/compiler/js-call-reducer.h
index 04a9cf920ec6d0..15228032cf9611 100644
--- a/deps/v8/src/compiler/js-call-reducer.h
+++ b/deps/v8/src/compiler/js-call-reducer.h
@@ -132,8 +132,6 @@ class V8_EXPORT_PRIVATE JSCallReducer final : public AdvancedReducer {
 
   Reduction ReduceAsyncFunctionPromiseCreate(Node* node);
   Reduction ReduceAsyncFunctionPromiseRelease(Node* node);
-  Reduction ReducePromiseCapabilityDefaultReject(Node* node);
-  Reduction ReducePromiseCapabilityDefaultResolve(Node* node);
   Reduction ReducePromiseConstructor(Node* node);
   Reduction ReducePromiseInternalConstructor(Node* node);
   Reduction ReducePromiseInternalReject(Node* node);