diff --git a/README.md b/README.md
index 75de86c..e2be0f6 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,12 @@ Apple-1 Emulator
 - Emulates an Apple-1 with 32k of RAM
 - See [napple1](https://github.com/nobuh/napple1),
 [krusader](http://school.anhb.uwa.edu.au/personalpages/kwessen/apple1/Krusader.htm)
-and more [software](http://www.willegal.net/appleii/apple1-software.htm).
+and more [software](http://www.willegal.net/appleii/apple1-software.htm)
+
+Requirements
+------------
+- [6502 Emulation](https://github.com/jscrane/r65emu) library
+- [uC-Makefile](https://github.com/jscrane/uC-Makefile)
 
 Keyboard
 --------