diff --git a/numerical_methods/midpoint_integral_method.cpp b/numerical_methods/midpoint_integral_method.cpp
index c861460ae..2298526c5 100644
--- a/numerical_methods/midpoint_integral_method.cpp
+++ b/numerical_methods/midpoint_integral_method.cpp
@@ -15,6 +15,12 @@
  *
  * @author [ggkogkou](https://github.com/ggkogkou)
 */
+#include <iostream>          /// for IO operations
+#include <cmath>           /// for math functions
+#include <cassert>       /// for assert
+#include <cstdlib>     /// for std::atof
+#include <functional> /// for std::function
+#include <map>      /// for std::map container
 
 /**
  * @namespace numerical_methods