diff --git a/README.md b/README.md
index 3bb7e6f..f98657e 100644
--- a/README.md
+++ b/README.md
@@ -10,5 +10,7 @@ sudo ./setup-unattended-upgrades.sh
 
 ### Upgrade: Debian 12 to 13
 ```
-curl -s https://git.hibbit.net/rogier/scripts/raw/branch/master/debian12to13-upgrade.sh | bash
+wget https://git.hibbit.net/rogier/scripts/raw/branch/master/debian12to13-upgrade.sh && \
+chmod +x debian12to13-upgrade.sh && \
+./debian12to13-upgrade.sh
 ```
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