diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..e815a48
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,25 @@
+Copyright (c) 2020 Peter Cai
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
\ No newline at end of file
diff --git a/package.json b/package.json
index aeac0b4..28c3758 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "url": "git+https://github.com/PeterCxy/paprika.git"
   },
   "author": "PeterCxy",
-  "license": "WTFPL",
+  "license": "MIT",
   "bugs": {
     "url": "https://github.com/PeterCxy/paprika/issues"
   },
diff --git a/src/task/mod.rs b/src/task/mod.rs
index 6a02fd0..031dcae 100644
--- a/src/task/mod.rs
+++ b/src/task/mod.rs
@@ -1,4 +1,32 @@
 #[allow(dead_code)]
+/*
+  Copyright (c) 2019 Tokio Contributors
+
+  Permission is hereby granted, free of charge, to any
+  person obtaining a copy of this software and associated
+  documentation files (the "Software"), to deal in the
+  Software without restriction, including without
+  limitation the rights to use, copy, modify, merge,
+  publish, distribute, sublicense, and/or sell copies of
+  the Software, and to permit persons to whom the Software
+  is furnished to do so, subject to the following
+  conditions:
+
+  The above copyright notice and this permission notice
+  shall be included in all copies or substantial portions
+  of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+  ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+  TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+  PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+  SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+  IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+  DEALINGS IN THE SOFTWARE.
+*/
+
 // This module contains some kanged code from Tokio
 // because we cannot import the entire Tokio
 mod task_local;