diff --git a/common.gypi b/common.gypi
index 594b43df3c..65a3ff1191 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/flag-definitions.h b/deps/v8/src/flag-definitions.h
index 052869f308..4d5aa6f885 100644
--- a/deps/v8/src/flag-definitions.h
+++ b/deps/v8/src/flag-definitions.h
@@ -1243,6 +1243,9 @@ DEFINE_BOOL(log_function_events, false,
 DEFINE_BOOL(prof, false,
             "Log statistical profiling information (implies --log-code).")
 
+DEFINE_BOOL(detailed_line_info, true,
+            "Always generate detailed line information for CPU profiling.")
+
 #if defined(ANDROID)
 // Phones and tablets have processors that are much slower than desktop
 // and laptop computers for which current heuristics are tuned.
diff --git a/deps/v8/src/isolate.cc b/deps/v8/src/isolate.cc
index b0a970305e..b33b713672 100644
--- a/deps/v8/src/isolate.cc
+++ b/deps/v8/src/isolate.cc
@@ -3247,6 +3247,10 @@ bool Isolate::use_optimizer() {
          !is_precise_count_code_coverage() && !is_block_count_code_coverage();
 }
 
+bool Isolate::NeedsDetailedOptimizedCodeLineInfo() const {
+  return NeedsSourcePositionsForProfiling() || FLAG_detailed_line_info;
+}
+
 bool Isolate::NeedsSourcePositionsForProfiling() const {
   return FLAG_trace_deopt || FLAG_trace_turbo || FLAG_trace_turbo_graph ||
          FLAG_turbo_profiling || FLAG_perf_prof || is_profiling() ||
diff --git a/deps/v8/src/isolate.h b/deps/v8/src/isolate.h
index 09aaf99684..d94c0fde14 100644
--- a/deps/v8/src/isolate.h
+++ b/deps/v8/src/isolate.h
@@ -1044,6 +1044,8 @@ class Isolate : private HiddenFactory {
 
   bool NeedsSourcePositionsForProfiling() const;
 
+  bool NeedsDetailedOptimizedCodeLineInfo() const;
+
   bool is_best_effort_code_coverage() const {
     return code_coverage_mode() == debug::Coverage::kBestEffort;
   }
diff --git a/deps/v8/src/optimized-compilation-info.cc b/deps/v8/src/optimized-compilation-info.cc
index 09b8a0edea..77730919f1 100644
--- a/deps/v8/src/optimized-compilation-info.cc
+++ b/deps/v8/src/optimized-compilation-info.cc
@@ -38,7 +38,7 @@ OptimizedCompilationInfo::OptimizedCompilationInfo(
   // Collect source positions for optimized code when profiling or if debugger
   // is active, to be able to get more precise source positions at the price of
   // more memory consumption.
-  if (isolate->NeedsSourcePositionsForProfiling()) {
+  if (isolate->NeedsDetailedOptimizedCodeLineInfo()) {
     MarkAsSourcePositionsEnabled();
   }