diff --git a/fsm.test.ts b/fsm.test.ts
index a02498c..ffbcb1f 100644
--- a/fsm.test.ts
+++ b/fsm.test.ts
@@ -1,3 +1,20 @@
+/**
+ * Copyright (C) 2019, Dmitriy Pleshevskiy <dmitriy@pleshevski.ru>
+ *
+ * it-fsm is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * it-fsm is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with it-fsm.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 import {
   assertEquals,
   assertThrows,
diff --git a/fsm.ts b/fsm.ts
index 34e5fdf..c6e7e6a 100644
--- a/fsm.ts
+++ b/fsm.ts
@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2019, Dmitriy Pleshevskiy <dmitriy@ideascup.me>
+ * Copyright (C) 2019, Dmitriy Pleshevskiy <dmitriy@pleshevski.ru>
  *
  * it-fsm is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by