diff --git a/src/node.cc b/src/node.cc
index 9a85991a295aeb..51e97e0b8efadb 100644
--- a/src/node.cc
+++ b/src/node.cc
@@ -2394,11 +2394,10 @@ void DebugProcess(const FunctionCallbackInfo<Value>& args) {
     return env->ThrowError("Invalid number of arguments.");
   }
 
-  pid_t pid;
-  int r;
+  CHECK(args[0]->IsNumber());
+  pid_t pid = args[0].As<Integer>()->Value();
+  int r = kill(pid, SIGUSR1);
 
-  pid = args[0]->IntegerValue();
-  r = kill(pid, SIGUSR1);
   if (r != 0) {
     return env->ThrowErrnoException(errno, "kill");
   }
@@ -2416,7 +2415,6 @@ static int GetDebugSignalHandlerMappingName(DWORD pid, wchar_t* buf,
 static void DebugProcess(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
   Isolate* isolate = args.GetIsolate();
-  DWORD pid;
   HANDLE process = nullptr;
   HANDLE thread = nullptr;
   HANDLE mapping = nullptr;
@@ -2428,7 +2426,8 @@ static void DebugProcess(const FunctionCallbackInfo<Value>& args) {
     goto out;
   }
 
-  pid = (DWORD) args[0]->IntegerValue();
+  CHECK(args[0]->IsNumber());
+  DWORD pid = args[0].As<Integer>()->Value();
 
   process = OpenProcess(PROCESS_CREATE_THREAD | PROCESS_QUERY_INFORMATION |
                             PROCESS_VM_OPERATION | PROCESS_VM_WRITE |
diff --git a/src/node_buffer.cc b/src/node_buffer.cc
index 7c4c0d9f657b24..465c42047911b0 100644
--- a/src/node_buffer.cc
+++ b/src/node_buffer.cc
@@ -173,7 +173,8 @@ inline MUST_USE_RESULT bool ParseArrayIndex(Local<Value> arg,
     return true;
   }
 
-  int64_t tmp_i = arg->IntegerValue();
+  CHECK(arg->IsNumber());
+  int64_t tmp_i = arg.As<Integer>()->Value();
 
   if (tmp_i < 0)
     return false;
@@ -769,7 +770,7 @@ void IndexOfString(const FunctionCallbackInfo<Value>& args) {
   SPREAD_BUFFER_ARG(args[0], ts_obj);
 
   Local<String> needle = args[1].As<String>();
-  int64_t offset_i64 = args[2]->IntegerValue();
+  int64_t offset_i64 = args[2].As<Integer>()->Value();
   bool is_forward = args[4]->IsTrue();
 
   const char* haystack = ts_obj_data;
@@ -885,7 +886,7 @@ void IndexOfBuffer(const FunctionCallbackInfo<Value>& args) {
   THROW_AND_RETURN_UNLESS_BUFFER(Environment::GetCurrent(args), args[1]);
   SPREAD_BUFFER_ARG(args[0], ts_obj);
   SPREAD_BUFFER_ARG(args[1], buf);
-  int64_t offset_i64 = args[2]->IntegerValue();
+  int64_t offset_i64 = args[2].As<Integer>()->Value();
   bool is_forward = args[4]->IsTrue();
 
   const char* haystack = ts_obj_data;
@@ -955,7 +956,7 @@ void IndexOfNumber(const FunctionCallbackInfo<Value>& args) {
   SPREAD_BUFFER_ARG(args[0], ts_obj);
 
   uint32_t needle = args[1].As<Uint32>()->Value();
-  int64_t offset_i64 = args[2]->IntegerValue();
+  int64_t offset_i64 = args[2].As<Integer>()->Value();
   bool is_forward = args[3]->IsTrue();
 
   int64_t opt_offset = IndexOfOffset(ts_obj_length, offset_i64, 1, is_forward);
diff --git a/src/node_crypto.cc b/src/node_crypto.cc
index 851dc656742081..203d6b4aacfc17 100644
--- a/src/node_crypto.cc
+++ b/src/node_crypto.cc
@@ -979,15 +979,16 @@ void SecureContext::SetDHParam(const FunctionCallbackInfo<Value>& args) {
 void SecureContext::SetOptions(const FunctionCallbackInfo<Value>& args) {
   SecureContext* sc;
   ASSIGN_OR_RETURN_UNWRAP(&sc, args.Holder());
+  int64_t val;
 
-  if (args.Length() != 1 || !args[0]->IntegerValue()) {
+  if (args.Length() != 1 ||
+      !args[0]->IntegerValue(args.GetIsolate()->GetCurrentContext()).To(&val)) {
     return THROW_ERR_INVALID_ARG_TYPE(
         sc->env(), "Options must be an integer value");
   }
 
-  SSL_CTX_set_options(
-      sc->ctx_.get(),
-      static_cast<long>(args[0]->IntegerValue()));  // NOLINT(runtime/int)
+  SSL_CTX_set_options(sc->ctx_.get(),
+                      static_cast<long>(val));  // NOLINT(runtime/int)
 }
 
 
diff --git a/src/node_http_parser.cc b/src/node_http_parser.cc
index be5937f71dac3d..a4b92cbb20bfd1 100644
--- a/src/node_http_parser.cc
+++ b/src/node_http_parser.cc
@@ -289,12 +289,16 @@ class Parser : public AsyncWrap, public StreamListener {
     MaybeLocal<Value> head_response =
         MakeCallback(cb.As<Function>(), arraysize(argv), argv);
 
-    if (head_response.IsEmpty()) {
+    int64_t val;
+
+    if (head_response.IsEmpty() || !head_response.ToLocalChecked()
+                                        ->IntegerValue(env()->context())
+                                        .To(&val)) {
       got_exception_ = true;
       return -1;
     }
 
-    return head_response.ToLocalChecked()->IntegerValue();
+    return val;
   }
 
 
diff --git a/src/process_wrap.cc b/src/process_wrap.cc
index 2ecc470e1e9f07..252bb9867fd6c2 100644
--- a/src/process_wrap.cc
+++ b/src/process_wrap.cc
@@ -132,8 +132,9 @@ class ProcessWrap : public HandleWrap {
         options->stdio[i].data.stream = stream;
       } else {
         Local<String> fd_key = env->fd_string();
-        int fd = static_cast<int>(
-            stdio->Get(context, fd_key).ToLocalChecked()->IntegerValue());
+        Local<Value> fd_value = stdio->Get(context, fd_key).ToLocalChecked();
+        CHECK(fd_value->IsNumber());
+        int fd = static_cast<int>(fd_value.As<Integer>()->Value());
         options->stdio[i].flags = UV_INHERIT_FD;
         options->stdio[i].data.fd = fd;
       }
diff --git a/src/tcp_wrap.cc b/src/tcp_wrap.cc
index f41a2ad5540b76..386f84bd33f407 100644
--- a/src/tcp_wrap.cc
+++ b/src/tcp_wrap.cc
@@ -207,7 +207,10 @@ void TCPWrap::Open(const FunctionCallbackInfo<Value>& args) {
   ASSIGN_OR_RETURN_UNWRAP(&wrap,
                           args.Holder(),
                           args.GetReturnValue().Set(UV_EBADF));
-  int fd = static_cast<int>(args[0]->IntegerValue());
+  int64_t val;
+  if (!args[0]->IntegerValue(args.GetIsolate()->GetCurrentContext()).To(&val))
+    return;
+  int fd = static_cast<int>(val);
   int err = uv_tcp_open(&wrap->handle_, fd);
 
   if (err == 0)