diff --git a/demo/docker-compose.yml.template b/demo/docker-compose.yml.template
index 94e1b43..c994136 100644
--- a/demo/docker-compose.yml.template
+++ b/demo/docker-compose.yml.template
@@ -79,7 +79,8 @@ services:
       homepage.group: "Infrastructure"
       homepage.name: "Docker Socket Proxy"
       homepage.icon: "docker"
-      homepage.description: "Secure proxy for Docker socket access (internal only)"
+      homepage.description: >-
+        Secure proxy for Docker socket access (internal only)
 
   # Homepage - Central Dashboard
   homepage:
@@ -343,10 +344,6 @@ services:
       resources:
         limits:
           memory: 256M
-    deploy:
-      resources:
-        limits:
-          memory: 256M
     healthcheck:
       test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider",
              "http://localhost:8080"]
@@ -437,7 +434,9 @@ services:
         limits:
           memory: 1024M
     healthcheck:
-      test: ["CMD-SHELL", "curl -sf http://localhost:9200/_cluster/health || exit 1"]
+      test:
+        ["CMD-SHELL",
+         "curl -sf http://localhost:9200/_cluster/health || exit 1"]
       interval: ${HEALTH_CHECK_INTERVAL}
       timeout: ${HEALTH_CHECK_TIMEOUT}
       retries: 10
diff --git a/demo/scripts/demo-stack.sh b/demo/scripts/demo-stack.sh
index 5d8ad45..dfef507 100755
--- a/demo/scripts/demo-stack.sh
+++ b/demo/scripts/demo-stack.sh
@@ -28,6 +28,8 @@ ensure_env() {
             exit 1
         fi
     fi
+    # Ensure new variables exist in older env files
+    grep -q '^MAILHOG_SMTP_PORT=' "$ENV_FILE" || echo "MAILHOG_SMTP_PORT=4019" >> "$ENV_FILE"
 }
 
 detect_user() {