diff --git a/include/docpp/HTML/element.hpp b/include/docpp/HTML/element.hpp
index f3caf95..2167204 100644
--- a/include/docpp/HTML/element.hpp
+++ b/include/docpp/HTML/element.hpp
@@ -8,6 +8,7 @@
 
 #include <string>
 #include <docpp/types.hpp>
+#include <docpp/HTML/formatting_enum.hpp>
 #include <docpp/HTML/properties.hpp>
 
 /**
diff --git a/src/CSS/element.cpp b/src/CSS/element.cpp
index 31e70e8..ecc5f8c 100644
--- a/src/CSS/element.cpp
+++ b/src/CSS/element.cpp
@@ -5,6 +5,7 @@
  * Copyright (c) 2024 speedie <speedie@speedie.site>
  */
 
+#include <docpp/except.hpp>
 #include <docpp/CSS/element.hpp>
 
 docpp::CSS::Element& docpp::CSS::Element::operator=(const docpp::CSS::Element& element) {