diff --git a/src/config.cpp b/src/config.cpp
index 7b31a76..429b9ac 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -1,14 +1,9 @@
-#include "../src/config.hpp"
-#include <iostream>
+#include "config.hpp"
+#include <unistd.h>
 #include <stdexcept>
 
 Configuration::Configuration(int argc, char **argv)
 {
-    if (argc <= 1)
-    {
-        return;
-    }
-
     int opt;
     while ((opt = getopt(argc, argv, "i:o:l")) != -1)
     {
@@ -24,8 +19,7 @@ Configuration::Configuration(int argc, char **argv)
             debug_lexer = true;
             break;
         default:
-            std::cerr << "Please specify input arguments\n";
+            throw std::runtime_error("Invalid arguments");
         }
     }
-    valid = true;
 }
diff --git a/src/config.hpp b/src/config.hpp
index 86d8018..eedb225 100644
--- a/src/config.hpp
+++ b/src/config.hpp
@@ -1,14 +1,12 @@
 #pragma once
-#include <getopt.h>
 #include <string>
 
 class Configuration
 {
 public:
-    std::string input_file = "";
-    std::string output_file = "";
+    std::string input_file;
+    std::string output_file;
     bool debug_lexer = false;
 
-    bool valid = false;
     Configuration(int argc, char **argv);
 };
diff --git a/src/main.cpp b/src/main.cpp
index 87b16c4..b1cd9a6 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -30,11 +30,6 @@ int main(int argc, char *argv[])
 {
     ParserCtx ctx;
     Configuration config(argc, argv);
-    if (!config.valid)
-    {
-        std::cout << "Please provide a valid configuration\n";
-        return -1;
-    }
 
     if (config.debug_lexer)
     {