diff --git a/src/container/queue.hpp b/src/container/queue.hpp
index 97918c9..8996eb1 100755
--- a/src/container/queue.hpp
+++ b/src/container/queue.hpp
@@ -1,3 +1,5 @@
+#pragma once
+
 #include "../util/util.hpp"
 
 #include <iostream>
diff --git a/src/exceptions.hpp b/src/exceptions.hpp
index bcc8ec1..ba912cf 100644
--- a/src/exceptions.hpp
+++ b/src/exceptions.hpp
@@ -1,3 +1,5 @@
+#pragma once
+
 #include <exception>
 #include <string>