diff --git a/.env.sample b/.env.sample
index d232c47..492c000 100644
--- a/.env.sample
+++ b/.env.sample
@@ -8,7 +8,7 @@ DOMAIN=hedgedoc.example.com
 LETS_ENCRYPT_ENV=production
 
 SECRET_DB_PASSWORD_VERSION=v1
-
+SECRET_CMD_SESSION_SECRET=v1
 COMPOSE_FILE="compose.yml"
 
 # OAuth, see https://docs.hedgedoc.org/guides/auth/keycloak/