diff --git a/README.md b/README.md
index 72dfdae..3246328 100644
--- a/README.md
+++ b/README.md
@@ -80,7 +80,7 @@
 A few notes:
 
 * Where there are pullups or references to Vcc below, I've
-  chosen to use the 3.3V pin on the Raspberry Pi Zero.
+  chosen to use a 5V pin on the Raspberry Pi Zero.
 
 * You'll need two TM1637-compatible 4-digit LED displays - one
   for time and one for temp.  Their CLK and DIO assignments