diff --git a/README.md b/README.md
index cc9a6ce..fa2803b 100644
--- a/README.md
+++ b/README.md
@@ -7,4 +7,16 @@ Ignition configurations for Fedora CoreOS<br />
 3. If you create a passwordless user that requires administrative privileges, ensure that it is part of the `sudo` group (CoreOS allows this group to use sudo without a password) as the configs will disable empty password system authentication.
 4. These configurations are made with a VPS in mind. You should adapt it for a bare metal deployment if that is what you are using (adding additional kernel parameters, configuring drive encryption, configuring storage, etc). You should also change the tuned profile from `virtual-guest` appropriately.
 5. In most of these configs, the timezone is set to `America/Phoenix` and the automatic reboot time is set at 12 AM on Sunday. You need to be mindful of timezones with Daylight Savings per [Zincati documentation](https://coreos.github.io/zincati/usage/updates-strategy/).
-6. The docker-compose-updater.service in `/etc/systemd/system` can be enabled to have automatic updates for your containers created by Docker Compose. Please make sure that the `WorkingDirectory` is appropriate.
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+6. The docker-compose-updater.service in `/etc/systemd/system` can be enabled to have automatic updates for your containers created by Docker Compose. Please make sure that the `WorkingDirectory` is appropriate.
+
+# Upgrading from Fedora CoreOS 39 to 40
+
+I am aware of a dependency issue which may cause the system to not automatically update itself to FCOS 40. To fix the problem, run:
+
+```
+systemctl stop zincati
+rpm-ostree override reset clevis tpm2-tools tpm2-tss-fapi
+rpm-ostree upgrade
+rpm-ostree override remove clevis tpm2-tools tpm2-tss-fapi clevis-pin-tpm2
+reboot
+```
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