diff --git a/src/Parser/Lexer.cpp b/src/Parser/Lexer.cpp
index 0778f6c..9753034 100644
--- a/src/Parser/Lexer.cpp
+++ b/src/Parser/Lexer.cpp
@@ -12,8 +12,8 @@ Lexer::Lexer(string* scriptString, class Script* script) {
     this -> _position = 0;
 }
 
-Lexer::Lexer(string scriptString, class Script *script) {
-    this -> _scriptString = &scriptString;
+Lexer::Lexer(const string& scriptString, class Script *script) {
+    this -> _scriptString = new string(scriptString);
     this->_scriptSize = scriptString.size();
     this -> ScriptData = script;
     this -> _position = 0;
diff --git a/src/Parser/Lexer.hpp b/src/Parser/Lexer.hpp
index caa9334..c951f8e 100644
--- a/src/Parser/Lexer.hpp
+++ b/src/Parser/Lexer.hpp
@@ -25,7 +25,7 @@ public:
 
     vector<IToken*> Lex();
     explicit Lexer(string* scriptString, class Script* script);
-    explicit Lexer(string scriptString, class Script* script);
+    explicit Lexer(const string& scriptString, class Script* script);
 
 };