diff --git a/.env.sample b/.env.sample
index e6aff1f..a16f0d9 100644
--- a/.env.sample
+++ b/.env.sample
@@ -10,6 +10,8 @@ LETS_ENCRYPT_ENV=production
 
 COMPOSE_FILE="compose.yml"
 
+SECRET_SESSION_SECRET_VERSION=v1
+
 # PostgreSQL
 
 #COMPOSE_FILE="$COMPOSE_FILE:compose.postgresql.yml"