diff --git a/deps/miniv8/src/MiniV8Api.cpp b/deps/miniv8/src/MiniV8Api.cpp
index 8c00d4343fabd00b3b8f6f5a1fcf917e5e32024d..ccfdd489d9d4b19f35404588aeaec3204fb330ab 100644
--- a/deps/miniv8/src/MiniV8Api.cpp
+++ b/deps/miniv8/src/MiniV8Api.cpp
@@ -1848,13 +1848,16 @@ v8::String::Utf8Value::Utf8Value(v8::Local<v8::Value> str)
     miniv8::V8String* v8string = v8::Utils::openHandle<v8::String, miniv8::V8String>(*(str.As<v8::String>()));
     const std::string& strv8 = v8string->getStr();
 
-    this->str_ = (char*)strv8.c_str();
     this->length_ = (int)strv8.size();
+    this->str_ = new char[this->length_ + 1];
+    std::strncpy(this->str_, strv8.c_str(), this->length_ + 1);
+    this->str_[this->length_] = '\0';
 }
 
 v8::String::Utf8Value::~Utf8Value(void)
 {
     printEmptyFuncInfo(__FUNCTION__, false, false);
+    delete[] str_;
 }
 
 #if V8_MINOR_VERSION < 8