diff --git a/user/downloading-installing-upgrading/upgrade/4_2.md b/user/downloading-installing-upgrading/upgrade/4_2.md
index 84cf80ef..74e1efa5 100644
--- a/user/downloading-installing-upgrading/upgrade/4_2.md
+++ b/user/downloading-installing-upgrading/upgrade/4_2.md
@@ -31,6 +31,16 @@ in-place:
 4. [Restore from your
    backup](/doc/how-to-back-up-restore-and-migrate/#restoring-from-a-backup) on
    your new 4.2 installation.
+5. In each old the old templates update the Qubes software sources from 4.1 to Qubes 4.2. Do this by opening a teminal in each of the imported templates and running the following commands:
+   - **Debian-based templates**:
+     ```
+     sudo sed -i 's/r4.[01]/r4.2/g' /etc/apt/sources.list.d/qubes-r4.list`
+     ```
+   - **Fedora-based templates**: 
+     ```
+     sudo sed -i 's/r4.[01]/r4.2/g' /etc/yum.repos.d/qubes-r4.repo
+     sudo sed -i 's/RPM-GPG-KEY-qubes-4\(\.1\)\{0,1\}-primary/RPM-GPG-KEY-qubes-4.2-primary/g' /etc/yum.repos.d/qubes-r4.repo
+     ```
 
 ## In-place upgrade