diff --git a/LICENSE_STDLIB b/LICENSE_STDLIB
new file mode 100644
index 000000000..e01d69c8e
--- /dev/null
+++ b/LICENSE_STDLIB
@@ -0,0 +1,20 @@
+Copyright (c) 2022 Christoffer Lernö and 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.
\ No newline at end of file
diff --git a/README.md b/README.md
index 0aa7d5e4a..543f40755 100644
--- a/README.md
+++ b/README.md
@@ -221,3 +221,8 @@ c3c compile main.c3
 ```
 
 The generated binary will be called `a.out`.
+
+#### Licensing
+
+The C3 compiler is licensed under LGPL 3.0, the standard library itself is
+MIT licensed.
\ No newline at end of file
diff --git a/resources/lib/std/array.c3 b/resources/lib/std/array.c3
index 74b858931..3285de1d7 100644
--- a/resources/lib/std/array.c3
+++ b/resources/lib/std/array.c3
@@ -1,3 +1,6 @@
+// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
+// Use of this source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
 module std::array;
 import std::mem;
 
diff --git a/resources/lib/std/atomic.c3 b/resources/lib/std/atomic.c3
index ea778e589..faa3a2771 100644
--- a/resources/lib/std/atomic.c3
+++ b/resources/lib/std/atomic.c3
@@ -1,2 +1,5 @@
+// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
+// Use of this source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
 module std::atomic;
 
diff --git a/resources/lib/std/builtin.c3 b/resources/lib/std/builtin.c3
index 6af2c8a31..ee5396538 100644
--- a/resources/lib/std/builtin.c3
+++ b/resources/lib/std/builtin.c3
@@ -1,3 +1,6 @@
+// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
+// Use of this source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
 module std::builtin;
 /*
 enum TypeKind
diff --git a/resources/lib/std/cinterop.c3 b/resources/lib/std/cinterop.c3
index e0a3d5f56..4c24c2c61 100644
--- a/resources/lib/std/cinterop.c3
+++ b/resources/lib/std/cinterop.c3
@@ -1,3 +1,6 @@
+// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
+// Use of this source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
 module std::cinterop;
 
 const C_INT_SIZE = ${C_INT_SIZE};
diff --git a/resources/lib/std/env.c3 b/resources/lib/std/env.c3
index e04eee38a..e458c8cbd 100644
--- a/resources/lib/std/env.c3
+++ b/resources/lib/std/env.c3
@@ -1,3 +1,6 @@
+// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
+// Use of this source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
 module std::env;
 
 enum CompilerOptLevel
diff --git a/resources/lib/std/hash/adler32.c3 b/resources/lib/std/hash/adler32.c3
index 43e160a95..52f65563c 100644
--- a/resources/lib/std/hash/adler32.c3
+++ b/resources/lib/std/hash/adler32.c3
@@ -1,3 +1,6 @@
+// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
+// Use of this source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
 module std::hash::adler32;
 
 private const uint ADLER_CONST = 65521;
diff --git a/resources/lib/std/hash/crc32.c3 b/resources/lib/std/hash/crc32.c3
index 6e4e9c496..e33471fcc 100644
--- a/resources/lib/std/hash/crc32.c3
+++ b/resources/lib/std/hash/crc32.c3
@@ -1,3 +1,6 @@
+// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
+// Use of this source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
 module std::hash::crc32;
 
 struct Crc32
diff --git a/resources/lib/std/hash/crc64.c3 b/resources/lib/std/hash/crc64.c3
index a8cf76786..f18ffba86 100644
--- a/resources/lib/std/hash/crc64.c3
+++ b/resources/lib/std/hash/crc64.c3
@@ -1,3 +1,6 @@
+// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
+// Use of this source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
 module std::hash::crc64;
 
 struct Crc64
diff --git a/resources/lib/std/io.c3 b/resources/lib/std/io.c3
index 9d6f3f3f9..c20a93006 100644
--- a/resources/lib/std/io.c3
+++ b/resources/lib/std/io.c3
@@ -1,3 +1,6 @@
+// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
+// Use of this source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
 module std::io;
 import std::mem;
 import libc;
diff --git a/resources/lib/std/libc.c3 b/resources/lib/std/libc.c3
index f0dbc78a7..28222fee0 100644
--- a/resources/lib/std/libc.c3
+++ b/resources/lib/std/libc.c3
@@ -1,3 +1,6 @@
+// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
+// Use of this source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
 module libc;
 
 // stdlib
diff --git a/resources/lib/std/linkedlist.c3 b/resources/lib/std/linkedlist.c3
index c77f20474..cfd4e30ba 100644
--- a/resources/lib/std/linkedlist.c3
+++ b/resources/lib/std/linkedlist.c3
@@ -1,3 +1,6 @@
+// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
+// Use of this source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
 module std::array::linkedlist<Type>;
 import std::mem;
 
diff --git a/resources/lib/std/list.c3 b/resources/lib/std/list.c3
index 89cf3400a..cf4972ddd 100644
--- a/resources/lib/std/list.c3
+++ b/resources/lib/std/list.c3
@@ -1,3 +1,6 @@
+// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
+// Use of this source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
 module std::array::list<Type>;
 import std::mem;
 
diff --git a/resources/lib/std/math.c3 b/resources/lib/std/math.c3
index 7d5c19825..8384e4a7a 100644
--- a/resources/lib/std/math.c3
+++ b/resources/lib/std/math.c3
@@ -1,3 +1,6 @@
+// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
+// Use of this source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
 module std::math;
 
 // TODO Define these using quad precision.
diff --git a/resources/lib/std/mem.c3 b/resources/lib/std/mem.c3
index 7e058a07d..1a03bad5e 100644
--- a/resources/lib/std/mem.c3
+++ b/resources/lib/std/mem.c3
@@ -1,3 +1,6 @@
+// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
+// Use of this source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
 module std::mem;
 
 extern fn void* _malloc(usize bytes) @extname("malloc");
diff --git a/resources/lib/std/runtime.c3 b/resources/lib/std/runtime.c3
index 81ed609d4..463d83749 100644
--- a/resources/lib/std/runtime.c3
+++ b/resources/lib/std/runtime.c3
@@ -1,3 +1,6 @@
+// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
+// Use of this source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
 module std::runtime;
 
 struct VirtualAny