diff --git a/compose.yml b/compose.yml
index 5de3e3b..14884a5 100644
--- a/compose.yml
+++ b/compose.yml
@@ -120,6 +120,7 @@ services:
       - SAML_SECURITY_WANT_ASSERTION_ENCRYPTED
       - SAML_SECURITY_WANT_ASSERTION_SIGNED
       - SAML_UID_ATTRIBUTE
+      - SECRET_KEY_BASE_FILE=/run/secrets/secret_key_base
       - SINGLE_USER_MODE
       - SMTP_AUTH_METHOD
       - SMTP_CA_FILE