diff --git a/INSTALL.md b/INSTALL.md
index 79022910..0e3d7b83 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -19,7 +19,7 @@ _Docker_ images are available, please see detailed instructions on https://hub.d
 _Bookworm_ packages are provided for _amd64_ architectures.
 As root, trust the following debian package provider and add it in your list of repositories:
 ```sh
-wget https://debian.poupon.dev/apt/debian/epoupon.gpg -P /usr/share/keyrings
+wget --backups=1 https://debian.poupon.dev/apt/debian/epoupon.gpg -P /usr/share/keyrings
 echo "deb [signed-by=/usr/share/keyrings/epoupon.gpg] https://debian.poupon.dev/apt/debian bookworm main" > /etc/apt/sources.list.d/epoupon.list
 ```
 To install or upgrade _LMS_: