diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,3 +1,16 @@
 Simple VGM
 
-a Java based VGM 1.50 player
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+a Java based Simple VGM 1.50 player
+
+Credits
+-------
+Java code lifted from here:
+https://github.com/GeoffWilson/VGM
+
+Original Game Music Emulator code:
+https://bitbucket.org/mpyne/game-music-emu
+
+License
+-------
+
+This software is released under a GPL 2.0 license
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