diff --git a/common.gypi b/common.gypi
index 79d4e69615aecb..d4b6b91e18f113 100644
--- a/common.gypi
+++ b/common.gypi
@@ -36,7 +36,7 @@
 
     # 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.60',
+    'v8_embedder_string': '-node.61',
 
     ##### V8 defaults for Node.js #####
 
diff --git a/deps/v8/src/objects/value-serializer.cc b/deps/v8/src/objects/value-serializer.cc
index 9e79f9ba434193..74c3d15e185942 100644
--- a/deps/v8/src/objects/value-serializer.cc
+++ b/deps/v8/src/objects/value-serializer.cc
@@ -1175,7 +1175,8 @@ Maybe<T> ValueDeserializer::ReadZigZag() {
 
 Maybe<double> ValueDeserializer::ReadDouble() {
   // Warning: this uses host endianness.
-  if (position_ > end_ - sizeof(double)) return Nothing<double>();
+  if (sizeof(double) > static_cast<unsigned>(end_ - position_))
+    return Nothing<double>();
   double value;
   memcpy(&value, position_, sizeof(double));
   position_ += sizeof(double);