diff --git a/src/Config.h b/src/Config.h
index 5a0154e..ce48c73 100644
--- a/src/Config.h
+++ b/src/Config.h
@@ -1,6 +1,7 @@
 #pragma once
 #include <string>
 #include <vector>
+#include <cstdint>
 
 class Config
 {
diff --git a/src/System.h b/src/System.h
index c051fd5..f40bef5 100644
--- a/src/System.h
+++ b/src/System.h
@@ -2,6 +2,7 @@
 #include <functional>
 #include <string>
 #include <vector>
+#include <cstdint>
 
 namespace System
 {