diff --git a/common.gypi b/common.gypi
index f5786ef89f209f..32499f8e3f6361 100644
--- a/common.gypi
+++ b/common.gypi
@@ -33,7 +33,7 @@
 
     # 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.55',
+    'v8_embedder_string': '-node.56',
 
     # Enable disassembler for `--print-code` v8 options
     'v8_enable_disassembler': 1,
diff --git a/deps/v8/src/s390/macro-assembler-s390.cc b/deps/v8/src/s390/macro-assembler-s390.cc
index 8ea37859441e54..807a3f2a99ab1f 100644
--- a/deps/v8/src/s390/macro-assembler-s390.cc
+++ b/deps/v8/src/s390/macro-assembler-s390.cc
@@ -1324,8 +1324,8 @@ void MacroAssembler::CheckDebugHook(Register fun, Register new_target,
   ExternalReference debug_hook_active =
       ExternalReference::debug_hook_on_function_call_address(isolate());
   Move(r6, debug_hook_active);
-  tm(MemOperand(r6), Operand::Zero());
-  bne(&skip_hook);
+  tm(MemOperand(r6), Operand(0xFF));
+  beq(&skip_hook);
 
   {
     // Load receiver to pass it later to DebugOnFunctionCall hook.