diff --git a/docker/red-ui/docker-entrypoint.sh b/docker/red-ui/docker-entrypoint.sh
index a7a952220..57c9ace31 100755
--- a/docker/red-ui/docker-entrypoint.sh
+++ b/docker/red-ui/docker-entrypoint.sh
@@ -39,7 +39,7 @@ echo '{
           "SELECTION_MODE":"'"$SELECTION_MODE"'",
           "MAX_FILE_SIZE_MB":"'"$MAX_FILE_SIZE_MB"'",
           "RECENT_PERIOD_IN_HOURS":'"$RECENT_PERIOD_IN_HOURS"',
-          "DELETE_RETENTION_HOURS""'"$DELETE_RETENTION_HOURS"',
+          "DELETE_RETENTION_HOURS":'"$DELETE_RETENTION_HOURS"',
           "API_URL":"'"$API_URL"'"
        }' > /usr/share/nginx/html/ui/assets/config/config.json