diff --git a/README.md b/README.md
index 8ff1a97..b51549a 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 A simple voice recorder for Arduino using an SD card and an electret microphone amplifier circuit.
 
+Independent of any third-party libraries.
+
 ## Wiring (also documented in spybug/spybug.ino)
 ### SD Card Wiring
 SD       | Nano