diff -Naur old-source/tomlcpp.hpp new-source/tomlcpp.hpp
--- tomlcpp/tomlcpp.hpp	1969-12-31 21:00:01.000000000 -0300
+++ tomlcpp/tomlcpp.hpp	2022-04-14 12:50:14.269775437 -0300
@@ -25,6 +25,11 @@
 #ifndef TOML_HPP
 #define TOML_HPP
 
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
 struct toml_table_t;
 struct toml_array_t;