diff --git a/frontend.yaml b/frontend.yaml
index 7e7e272..58ad4a0 100644
--- a/frontend.yaml
+++ b/frontend.yaml
@@ -72,7 +72,7 @@ services:
       - elabftw_sql_key
       - elabftw_secret_key
     environment:
-      SECRET_KEY: /run/secrets/elabftw_secret_key
+      SECRET_KEY: "${cat /run/secrets/elabftw_secret_key}"
       DB_HOST: "172.252.0.7"
       DB_PORT: "3306"
       DB_NAME: "elabftw"