diff --git a/src/html2md.cpp b/src/html2md.cpp
index f051131..f1f6929 100644
--- a/src/html2md.cpp
+++ b/src/html2md.cpp
@@ -4,6 +4,7 @@
 #include "html2md.h"
 #include "table.h"
 
+#include <algorithm>
 #include <cstring>
 #include <functional>
 #include <memory>