diff --git a/src/Types.hpp b/src/Types.hpp
index b516cb4a..99bc1588 100644
--- a/src/Types.hpp
+++ b/src/Types.hpp
@@ -1,7 +1,7 @@
 #pragma once
 
-#include <vector>
 #include <cstddef>
+#include <vector>
 
 namespace AQNWB
 {