diff --git a/README.md b/README.md
index c899bd3..d782bcc 100644
--- a/README.md
+++ b/README.md
@@ -206,4 +206,5 @@ Test the prototype.
     [x] PCB v1.8.1 redesigned to fit HDMI 649-10029449-111RLF (the cheapest)
     [ ] use cheaper diodes 583-MM4148-T in SOD-80C package
     [x] fix copper layer after using non-handsoldering resistor footprints
+    [ ] SW1 must be pulled up at 2.5/3.3V line not fixed 3.3V