diff --git a/installing/installation-guide.md b/installing/installation-guide.md
index a097583c..da52d683 100644
--- a/installing/installation-guide.md
+++ b/installing/installation-guide.md
@@ -31,8 +31,16 @@ Furthermore, if you are installing Qubes on a potentially compromised system, we
 Qubes 4.0.1 Warning
 -------------------
 
-After installing Qubes 4.0.1, please install fresh APT-based (e.g., Debian and Whonix) TemplateVMs in order to be protected from the APT update mechanism vulnerability that was patched after the release of 4.0.1.
-For instructions and further details, please see [QSB #46].
+Immediately after installing Qubes 4.0.1, please upgrade all of your APT-based (e.g., Debian and Whonix) TemplateVMs by executing the following command in a dom0 terminal for each such TemplateVM:
+
+    $ sudo qubes-dom0-update --action=upgrade <template-package-name>
+
+For example, the command for the `debian-9` TemplateVM would be:
+
+    $ sudo qubes-dom0-update --action=upgrade qubes-template-debian-9
+
+These upgrades are required in order to be protected from the APT update mechanism vulnerability that was announced and patched in [QSB #46], which was after the release of Qubes 4.0.1.
+This method is simpler than the method recommended in [QSB #46], but it is just as safe and effective so long as it is performed immediately after installing Qubes OS.
 
 
 Hardware Requirements