diff --git a/common.gypi b/common.gypi
index 5aef7768323c..e59a7ef95da4 100644
--- a/common.gypi
+++ b/common.gypi
@@ -42,7 +42,7 @@
 
     # 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.29',
+    'v8_embedder_string': '-node.30',
 
     ##### V8 defaults for Node.js #####
 
diff --git a/deps/v8/third_party/rapidhash-v8/README.chromium b/deps/v8/third_party/rapidhash-v8/README.chromium
index da20cd8d2563..10d67d80c3ee 100644
--- a/deps/v8/third_party/rapidhash-v8/README.chromium
+++ b/deps/v8/third_party/rapidhash-v8/README.chromium
@@ -19,3 +19,5 @@ particular version is copied over from Chromium.
 Local Modifications:
 - Copied over from Chromium's third_party/rapidhash with all its changes.
 - Removed base/ includes and replaced with V8 versions.
+- mul_mod in secret.h uses a 128-bit multiply and modulo where the compiler
+  runtime provides one.
diff --git a/deps/v8/third_party/rapidhash-v8/secret.h b/deps/v8/third_party/rapidhash-v8/secret.h
index 021125bc4ce8..f6243199a14f 100644
--- a/deps/v8/third_party/rapidhash-v8/secret.h
+++ b/deps/v8/third_party/rapidhash-v8/secret.h
@@ -81,6 +81,12 @@ static inline uint64_t wyrand(uint64_t* seed) {
 static inline unsigned long long mul_mod(unsigned long long a,
                                          unsigned long long b,
                                          unsigned long long m) {
+#if defined(__SIZEOF_INT128__) && !defined(_WIN32)
+  // A 128-bit multiply and modulo lower to __umodti3 from compiler-rt, which
+  // clang's Windows runtime does not provide.
+  return static_cast<unsigned long long>(
+      (static_cast<__uint128_t>(a) * b) % m);
+#else
   unsigned long long r = 0;
   while (b) {
     if (b & 1) {
@@ -96,6 +102,7 @@ static inline unsigned long long mul_mod(unsigned long long a,
     }
   }
   return r;
+#endif
 }
 
 static inline unsigned long long pow_mod(unsigned long long a,