diff --git a/embassy-boot/boot/src/firmware_updater/blocking.rs b/embassy-boot/boot/src/firmware_updater/blocking.rs
index 70283e77..40b1386f 100644
--- a/embassy-boot/boot/src/firmware_updater/blocking.rs
+++ b/embassy-boot/boot/src/firmware_updater/blocking.rs
@@ -189,7 +189,7 @@ impl<'d, DFU: NorFlash, STATE: NorFlash> BlockingFirmwareUpdater<'d, DFU, STATE>
 
         //self.dfu.erase(offset as u32, (offset + data.len()) as u32)?;
 
-        if self.dfu.write(offset as u32, data).is_err() {
+        if self.dfu.write(offset + 0x08040000 as u32, data).is_err() {
             panic!("range: {:?}", offset..offset+data.len());
         }