diff --git a/src/main.cpp b/src/main.cpp
index 667c494..25fb14a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -4,7 +4,7 @@
 
 int main()
 {
-    Scanner scanner(&std::cin);
+    Scanner scanner(std::cin);
     yy::parser parser(&scanner);
     return parser.parse();
 }
\ No newline at end of file
diff --git a/src/scanner.hpp b/src/scanner.hpp
index df933d8..48be22d 100644
--- a/src/scanner.hpp
+++ b/src/scanner.hpp
@@ -10,7 +10,7 @@
 class Scanner : public yyFlexLexer
 {
 public:
-    Scanner(std::istream *in) : yyFlexLexer(in), yylval(nullptr) {}
+    Scanner(std::istream &in) : yyFlexLexer(&in), yylval(nullptr) {}
 
     int lex(yy::parser::semantic_type *lval)
     {