diff --git a/include/bits/soi-io.hpp b/include/bits/soi-io.hpp
index 4e8acfb..14ba043 100644
--- a/include/bits/soi-io.hpp
+++ b/include/bits/soi-io.hpp
@@ -19,7 +19,7 @@ std::tuple<T1, T2, T3, Ts...> read() {
   return std::tuple<T1, T2, T3, Ts...>{read<T1>(), read<T2>(), read<T3>(), read<Ts>()...};
 }
 
-int read_int() { return read<int>(); }
+int64_t read_int() { return read<int64_t>(); }
 char read_char() { return read<char>(); }
 double read_double() { return read<double>(); }
 std::string read_string() { return read<std::string>(); }