diff --git a/.github/workflows/update-os.yml b/.github/workflows/update-os.yml
index 06e17cc..51c4f91 100644
--- a/.github/workflows/update-os.yml
+++ b/.github/workflows/update-os.yml
@@ -24,7 +24,7 @@ jobs:
           TINDIE_USERNAME: ${{ secrets.TINDIE_USERNAME }}
         with:
           # Set the base_image to the desired Raspberry Pi OS version
-          base_image: https://downloads.raspberrypi.com/raspios_lite_armhf/images/raspios_lite_armhf-2023-12-11/
+          base_image: https://downloads.raspberrypi.com/raspios_lite_armhf/images/raspios_lite_armhf-2023-12-11/2023-12-11-raspios-bookworm-armhf-lite.img.xz
           image_additional_mb: 3072 # enlarge free space to 3 GB
           optimize_image: true
           commands: |
diff --git a/README.md b/README.md
index e7d54b1..2e43063 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# Welcome to inkycal v2.0.3!
+# Welcome to inkycal v2.0.4!
 
 <p align="center">
     <a href="https://github.com/aceinnolab/Inkycal/actions/workflows/test-on-rpi.yml"><img src="https://github.com/aceinnolab/Inkycal/actions/workflows/test-on-rpi.yml/badge.svg"></a>