diff --git a/include/s0007_reverse_integer.hpp b/include/s0007_reverse_integer.hpp
index 82f7328..cf93189 100644
--- a/include/s0007_reverse_integer.hpp
+++ b/include/s0007_reverse_integer.hpp
@@ -3,6 +3,7 @@
 
 #include <queue>
 #include <cmath>
+#include <climits>
 
 class Solution {
 public:
diff --git a/include/s0008_string_to_integer.hpp b/include/s0008_string_to_integer.hpp
index 5ecd22b..1b25b40 100644
--- a/include/s0008_string_to_integer.hpp
+++ b/include/s0008_string_to_integer.hpp
@@ -4,6 +4,7 @@
 #include <string>
 #include <unordered_map>
 #include <vector>
+#include <climits>
 
 using namespace std;