diff --git a/README.md b/README.md
index 9e32288..f358c31 100644
--- a/README.md
+++ b/README.md
@@ -66,3 +66,4 @@ section (thicker power lines, separately routed feedback)
     [ ] compile a f32c bitstream using the schematics
     [ ] connect more lines from ESP-32 to FPGA
     [ ] connect FPGA USB D+/D- with 1.5k pullup in USB 1.1 (full speed) mode
+    [ ] Jumpers to switch 2.5V/3.3V for left IO banks