diff --git a/apps/fwupdate/ChangeLog b/apps/fwupdate/ChangeLog
index ea0b48eb9..a9673f6de 100644
--- a/apps/fwupdate/ChangeLog
+++ b/apps/fwupdate/ChangeLog
@@ -6,3 +6,4 @@
       Add CRC checks for common bootloaders that we know don't work
 0.04: Include a precompiled bootloader for easy bootloader updates
 0.05: Rename Bootloader->DFU and add explanation to avoid confusion with Bootloader app
+0.06: Lower chunk size to 1024 (from 2048) to make firmware updates more reliable
diff --git a/apps/fwupdate/custom.html b/apps/fwupdate/custom.html
index 31eb4a256..9e86a1c0f 100644
--- a/apps/fwupdate/custom.html
+++ b/apps/fwupdate/custom.html
@@ -317,7 +317,7 @@ function createJS_app(binary, startAddress, endAddress) {
   hexJS += `\x10if (E.CRC32(E.memoryArea(0xF7000,0x7000))==1207580954) { print("DFU 2v10.236 needs update"); load();}\n`;
   hexJS += '\x10var s = require("Storage");\n';
   hexJS += '\x10s.erase(".firmware");\n';
-  var CHUNKSIZE = 2048;
+  var CHUNKSIZE = 1024;
   for (var i=0;i<binary.length;i+=CHUNKSIZE) {
     var l = binary.length-i;
     if (l>CHUNKSIZE) l=CHUNKSIZE;
diff --git a/apps/fwupdate/metadata.json b/apps/fwupdate/metadata.json
index 372f6850c..e3294f316 100644
--- a/apps/fwupdate/metadata.json
+++ b/apps/fwupdate/metadata.json
@@ -1,7 +1,7 @@
 {
   "id": "fwupdate",
   "name": "Firmware Update",
-  "version": "0.05",
+  "version": "0.06",
   "description": "Uploads new Espruino firmwares to Bangle.js 2",
   "icon": "app.png",
   "type": "RAM",