diff --git a/preseed.cfg b/preseed.cfg
index 0a500ec..3cc528e 100644
--- a/preseed.cfg
+++ b/preseed.cfg
@@ -65,6 +65,6 @@ d-i grub-installer/bootdev string default
 d-i finish-install/reboot_in_progress note
 d-i preseed/late_command string \
     # Download and execute post_install.sh
-    in-target curl -o /tmp/post_install.sh https://example.com/post_install.sh; \
+    in-target curl -o /tmp/post_install.sh https://git.hamburg.ccc.de/ViMaSter/preseed/raw/branch/main/post_install.sh; \
     in-target chmod +x /tmp/post_install.sh; \
     in-target /tmp/post_install.sh