diff --git a/conex/debug_macros.h b/conex/debug_macros.h
index b072967..c1b7001 100644
--- a/conex/debug_macros.h
+++ b/conex/debug_macros.h
@@ -1,9 +1,9 @@
 #pragma once
 #include <chrono>
+#include <array>
 #include <iomanip>
 #include <iostream>
 #include <vector>
-#include <array>
 
 namespace conex {
 
diff --git a/conex/tree_utils.cc b/conex/tree_utils.cc
index 8d30266..2c1601b 100644
--- a/conex/tree_utils.cc
+++ b/conex/tree_utils.cc
@@ -1,8 +1,8 @@
 #include "conex/tree_utils.h"
 #include "assert.h"
+#include <array>
 #include <stack>
 #include <vector>
-#include <array>
 
 using std::array;
 using std::vector;