diff --git a/LICENSE b/LICENSE
index e7fe790..a3292b1 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,7 @@
 MIT License
 
 Copyright (c) 2017 CK Tan
+https://github.com/cktan/tomlc99
 
 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/toml.c b/toml.c
index 6b602e1..8bf1720 100644
--- a/toml.c
+++ b/toml.c
@@ -1,7 +1,8 @@
 /*
 MIT License
 
-Copyright (c) 2017 CK Tan
+Copyright (c) 2017 CK Tan 
+https://github.com/cktan/tomlc99
 
 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/toml.h b/toml.h
index 2752b80..54c1c82 100644
--- a/toml.h
+++ b/toml.h
@@ -2,6 +2,7 @@
 MIT License
 
 Copyright (c) 2017 CK Tan
+https://github.com/cktan/tomlc99
 
 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/toml_cat.c b/toml_cat.c
index f1558a0..e4800cd 100644
--- a/toml_cat.c
+++ b/toml_cat.c
@@ -1,5 +1,30 @@
+/*
+MIT License
+
+Copyright (c) 2017 CK Tan
+https://github.com/cktan/tomlc99
+
+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.
+*/
+
 #ifdef NDEBUG
-#under NDEBUG
+#undef NDEBUG
 #endif
 
 #include <stdio.h>
diff --git a/toml_json.c b/toml_json.c
index 8c77fa5..c15e663 100644
--- a/toml_json.c
+++ b/toml_json.c
@@ -1,3 +1,27 @@
+/*
+MIT License
+
+Copyright (c) 2017 CK Tan
+https://github.com/cktan/tomlc99
+
+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.
+*/
 #ifdef NDEBUG
 #undef NDEBUG
 #endif