--- core/src/Generator.h
+++ core/src/Generator.h
@@ -6,7 +6,9 @@
 #pragma once
 
 #ifdef __cpp_impl_coroutine
+#include <concepts>
 #include <coroutine>
+#include <iterator>
 #include <optional>
 
 // this code is based on https://en.cppreference.com/w/cpp/coroutine/coroutine_handle#Example