diff --git a/crypto1_bs.c b/crypto1_bs.c
index 0f12495..0fb2c2f 100644
--- a/crypto1_bs.c
+++ b/crypto1_bs.c
@@ -1,5 +1,26 @@
 // Bit-sliced Crypto-1 implementation (C) 2015-2016 by Aram Verstegen
 // The cipher states are stored with the least significant bit first, hence all bit indexes are reversed here
+/*
+Copyright (c) 2015-2016 Aram Verstegen
+
+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.
+*/
 
 #include "crypto1_bs.h"
 
diff --git a/crypto1_bs_crack.c b/crypto1_bs_crack.c
index 6b29c91..1f9cc98 100644
--- a/crypto1_bs_crack.c
+++ b/crypto1_bs_crack.c
@@ -1,5 +1,26 @@
 // Bit-sliced Crypto-1 brute-forcing implementation (C) 2015-2016 by Aram Verstegen
 // Builds on the data structures returned by CraptEV1 craptev1_get_space(nonces, threshold, uid)
+/*
+Copyright (c) 2015-2016 Aram Verstegen
+
+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.
+*/
 
 #include <malloc.h>
 #include "crypto1_bs_crack.h"