diff --git a/LICENSE.md b/LICENSE.md
index 7b1f40a..2ffc5a0 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (C) 2018-2019, by Matvey Cherevko (blackmatov@gmail.com)
+Copyright (C) 2018-2021, by Matvey Cherevko (blackmatov@gmail.com)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/headers/promise.hpp/jobber.hpp b/headers/promise.hpp/jobber.hpp
index 58b0434..7bb3e8a 100644
--- a/headers/promise.hpp/jobber.hpp
+++ b/headers/promise.hpp/jobber.hpp
@@ -1,7 +1,7 @@
 /*******************************************************************************
  * This file is part of the "https://github.com/blackmatov/promise.hpp"
  * For conditions of distribution and use, see copyright notice in LICENSE.md
- * Copyright (C) 2018-2019, by Matvey Cherevko (blackmatov@gmail.com)
+ * Copyright (C) 2018-2021, by Matvey Cherevko (blackmatov@gmail.com)
  ******************************************************************************/
 
 #pragma once
diff --git a/headers/promise.hpp/promise.hpp b/headers/promise.hpp/promise.hpp
index daff97e..4aa3248 100644
--- a/headers/promise.hpp/promise.hpp
+++ b/headers/promise.hpp/promise.hpp
@@ -1,7 +1,7 @@
 /*******************************************************************************
  * This file is part of the "https://github.com/blackmatov/promise.hpp"
  * For conditions of distribution and use, see copyright notice in LICENSE.md
- * Copyright (C) 2018-2019, by Matvey Cherevko (blackmatov@gmail.com)
+ * Copyright (C) 2018-2021, by Matvey Cherevko (blackmatov@gmail.com)
  ******************************************************************************/
 
 #pragma once
@@ -123,7 +123,7 @@ namespace promise_hpp
         std::size_t size() const noexcept {
             return (*state_).size();
         }
-        
+
         std::exception_ptr at(std::size_t index) const {
             return (*state_).at(index);
         }
@@ -886,7 +886,7 @@ namespace promise_hpp
                 std::forward<ResolveF>(on_resolve),
                 std::forward<RejectF>(on_reject),
                 true);
-                
+
             return next;
         }
 
diff --git a/headers/promise.hpp/scheduler.hpp b/headers/promise.hpp/scheduler.hpp
index d694ac6..0c89216 100644
--- a/headers/promise.hpp/scheduler.hpp
+++ b/headers/promise.hpp/scheduler.hpp
@@ -1,7 +1,7 @@
 /*******************************************************************************
  * This file is part of the "https://github.com/blackmatov/promise.hpp"
  * For conditions of distribution and use, see copyright notice in LICENSE.md
- * Copyright (C) 2018-2019, by Matvey Cherevko (blackmatov@gmail.com)
+ * Copyright (C) 2018-2021, by Matvey Cherevko (blackmatov@gmail.com)
  ******************************************************************************/
 
 #pragma once
diff --git a/untests/catch_main.cpp b/untests/catch_main.cpp
index 169f581..b6c87d4 100644
--- a/untests/catch_main.cpp
+++ b/untests/catch_main.cpp
@@ -1,7 +1,7 @@
 /*******************************************************************************
  * This file is part of the "https://github.com/blackmatov/promise.hpp"
  * For conditions of distribution and use, see copyright notice in LICENSE.md
- * Copyright (C) 2018-2019, by Matvey Cherevko (blackmatov@gmail.com)
+ * Copyright (C) 2018-2021, by Matvey Cherevko (blackmatov@gmail.com)
  ******************************************************************************/
 
 #define CATCH_CONFIG_MAIN
diff --git a/untests/jobber_tests.cpp b/untests/jobber_tests.cpp
index e536505..a4dc08b 100644
--- a/untests/jobber_tests.cpp
+++ b/untests/jobber_tests.cpp
@@ -1,7 +1,7 @@
 /*******************************************************************************
  * This file is part of the "https://github.com/blackmatov/promise.hpp"
  * For conditions of distribution and use, see copyright notice in LICENSE.md
- * Copyright (C) 2018-2019, by Matvey Cherevko (blackmatov@gmail.com)
+ * Copyright (C) 2018-2021, by Matvey Cherevko (blackmatov@gmail.com)
  ******************************************************************************/
 
 #define CATCH_CONFIG_FAST_COMPILE
diff --git a/untests/promise_tests.cpp b/untests/promise_tests.cpp
index 0102267..44d57eb 100644
--- a/untests/promise_tests.cpp
+++ b/untests/promise_tests.cpp
@@ -1,7 +1,7 @@
 /*******************************************************************************
  * This file is part of the "https://github.com/blackmatov/promise.hpp"
  * For conditions of distribution and use, see copyright notice in LICENSE.md
- * Copyright (C) 2018-2019, by Matvey Cherevko (blackmatov@gmail.com)
+ * Copyright (C) 2018-2021, by Matvey Cherevko (blackmatov@gmail.com)
  ******************************************************************************/
 
 #define CATCH_CONFIG_FAST_COMPILE
diff --git a/untests/scheduler_tests.cpp b/untests/scheduler_tests.cpp
index 7ae31f5..69a299c 100644
--- a/untests/scheduler_tests.cpp
+++ b/untests/scheduler_tests.cpp
@@ -1,7 +1,7 @@
 /*******************************************************************************
  * This file is part of the "https://github.com/blackmatov/promise.hpp"
  * For conditions of distribution and use, see copyright notice in LICENSE.md
- * Copyright (C) 2018-2019, by Matvey Cherevko (blackmatov@gmail.com)
+ * Copyright (C) 2018-2021, by Matvey Cherevko (blackmatov@gmail.com)
  ******************************************************************************/
 
 #define CATCH_CONFIG_FAST_COMPILE