diff --git a/src/exec.cpp b/src/exec.cpp
index ea35784..ebe5499 100644
--- a/src/exec.cpp
+++ b/src/exec.cpp
@@ -4,6 +4,8 @@
 #include <iostream>
 #include <array>
 
+#include <sys/wait.h>
+
 #define NUM_PIPES		  2
 #define PARENT_WRITE_PIPE  0
 #define PARENT_READ_PIPE   1
diff --git a/src/main.cpp b/src/main.cpp
index 90c25b6..c45f444 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -5,8 +5,10 @@
 #include <random>
 #include <numeric>
 #include <optional>
+#include <algorithm>
 
 #include <langinfo.h>
+#include <signal.h>
 
 using namespace std;
 
diff --git a/src/utils.cpp b/src/utils.cpp
index ce50fda..e32f671 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -1,5 +1,7 @@
 #include "complexity.hpp"
 
+#include <stdexcept>
+
 #include <sys/stat.h>
 
 const string &assertExecutable(const string &path) {