diff --git a/src/date/date.hpp b/src/date/date.hpp
index 050981f..7267b52 100644
--- a/src/date/date.hpp
+++ b/src/date/date.hpp
@@ -5,6 +5,7 @@
 #ifndef CLANGTOOLS_DATE_HPP
 #define CLANGTOOLS_DATE_HPP
 #include <ctime>
+#include <chrono>
 #include <istream>
 #include <memory>
 #include <string>
diff --git a/src/json11/json11.cpp b/src/json11/json11.cpp
index 786bf5f..3d3abb3 100644
--- a/src/json11/json11.cpp
+++ b/src/json11/json11.cpp
@@ -25,7 +25,7 @@
 #include <cstdlib>
 #include <cstdio>
 #include <limits>
-
+using namespace std;
 namespace json11 {
 
     static const int max_depth = 200;