diff --git a/src/lexer.h b/src/lexer.h
index 1efc761..161f7f8 100644
--- a/src/lexer.h
+++ b/src/lexer.h
@@ -8,7 +8,7 @@
 namespace Solstice {
     struct Token {
         std::string value;
-        int line;
+        size_t line;
         std::string lineContent;
     };
 
@@ -26,4 +26,4 @@ namespace Solstice {
     };
 }
 
-#endif
\ No newline at end of file
+#endif