diff --git a/unlock-ben-eater-hardware/README.md b/unlock-ben-eater-hardware/README.md
index 15e5594..58c352c 100644
--- a/unlock-ben-eater-hardware/README.md
+++ b/unlock-ben-eater-hardware/README.md
@@ -8,7 +8,7 @@ programmer design.  This hardware is similar to the TommyPROM hardware, but it u
 different shift register chips and different pin assignments.
 
 To meet the 
-[timing requirements of the SDP unlock](https://tomnisbet.github.io/TommyPROM/28C256-notes/), 
+[timing requirements of the SDP unlock](https://tomnisbet.github.io/TommyPROM/docs/28C256-notes), 
 this code uses direct port writes
 to set and read values on the data bus.  It will work with Arduino Uno and Nano hardware,
 but would require changes for other platforms.