diff --git a/.env b/.env
index 8f75276..8c1470a 100644
--- a/.env
+++ b/.env
@@ -12,3 +12,4 @@ PROXY_AUTH_USER=
 PROXY_AUTH_PASS=
 DOCKER_DEPLOYMENT=1
 LDAPTLS_REQCERT=never
+SECURITY_SALT=Set-this-sensitive-key-value-to-something-unique
diff --git a/docker-compose.simple-install.yml b/docker-compose.simple-install.yml
index ef988b0..6925c50 100644
--- a/docker-compose.simple-install.yml
+++ b/docker-compose.simple-install.yml
@@ -34,6 +34,7 @@ services:
       - ./apache/vhost-ssl.conf:/etc/apache2/sites-available/000-default.conf
       - ./crontab/crontab:/etc/cron.d/eramba-crontab
     environment:
+      SECURITY_SALT: ${SECURITY_SALT}
       DB_HOST: ${DB_HOST}
       DB_DATABASE: ${DB_DATABASE}
       DB_USERNAME: ${DB_USERNAME}
@@ -66,6 +67,7 @@ services:
       - ./crontab/crontab:/etc/cron.d/eramba-crontab
       - .env:/var/www/docker.env
     environment:
+      SECURITY_SALT: ${SECURITY_SALT}
       DB_HOST: ${DB_HOST}
       DB_DATABASE: ${DB_DATABASE}
       DB_USERNAME: ${DB_USERNAME}