diff --git a/include/crow/utility.h b/include/crow/utility.h
index b81e862a5..b951aa6b1 100644
--- a/include/crow/utility.h
+++ b/include/crow/utility.h
@@ -11,6 +11,7 @@
 #include <sstream>
 #include <unordered_map>
 #include <random>
+#include <algorithm>
 
 #include "crow/settings.h"