diff --git a/src/json_value.h b/src/json_value.h
index cdf797a..56d88ca 100644
--- a/src/json_value.h
+++ b/src/json_value.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <cstddef>
+#include <cstdint>
 #include <map>
 #include <memory>
 #include <optional>