diff --git a/Upgrade-from-a-previous-version.md b/Upgrade-from-a-previous-version.md
index 109a0c4..7157e7a 100644
--- a/Upgrade-from-a-previous-version.md
+++ b/Upgrade-from-a-previous-version.md
@@ -4,7 +4,14 @@ This page will list all necessary edits following every update.
 
 #### From 1.0.x to 1.1.x
 
-You now need to use `cargo run --no-default-features --features sqlite` to compile, unless you want to migrate to PostgreSQL or MySQL. See [this page](/wiki/Setting-up-Nextcloud-and-sncf) for more information.
+You now need to use `cargo run --release --no-default-features --features sqlite` to compile, unless you want to migrate to PostgreSQL or MySQL. See [this page](/wiki/Setting-up-Nextcloud-and-sncf) for more information.
+
+#### From 1.1.x to 1.2.x
+
+The configuration option `cookie_key` has been added. To upgrade:
+- Generate a cookie key using `openssl rand -base64 32`
+- add the line `cookie_key = "<your-base64-encoded-key>"` in the configuration file
+- change `config_version = 1` to `config_version = 2`. Save and upgrade.
 
 ### Nextcloud updates