diff --git a/deploy_gb.sh b/deploy_gb.sh
index 91ee554..866b6a5 100644
--- a/deploy_gb.sh
+++ b/deploy_gb.sh
@@ -176,16 +176,20 @@ echo "  ✓ No critical errors in logs"
 # 6.2 Nginx 설정 검증
 echo "  Checking Nginx configuration..."
 NGINX_TEST_LOG=$(mktemp)
-if ! sudo nginx -t >"$NGINX_TEST_LOG" 2>&1; then
-  echo "❌ Nginx configuration is invalid"
-  tail -50 "$NGINX_TEST_LOG" 2>/dev/null || true
-  rm -f "$NGINX_TEST_LOG"
-  echo "🔙 Rolling back..."
-  kill -9 $NEW_PID || true
-  exit 1
+if command -v sudo >/dev/null 2>&1 && sudo -n true 2>/dev/null; then
+  if ! sudo -n nginx -t >"$NGINX_TEST_LOG" 2>&1; then
+    echo "❌ Nginx configuration is invalid"
+    tail -50 "$NGINX_TEST_LOG" 2>/dev/null || true
+    rm -f "$NGINX_TEST_LOG"
+    echo "🔙 Rolling back..."
+    kill -9 $NEW_PID || true
+    exit 1
+  fi
+  echo "  ✓ Nginx configuration is valid"
+else
+  echo "  ⚠️ Skipping Nginx validation: sudo -n unavailable in this environment"
 fi
 rm -f "$NGINX_TEST_LOG"
-echo "  ✓ Nginx configuration is valid"
 
 # 6.3 프로세스가 여전히 실행 중인지 확인
 if ! ps -p $NEW_PID > /dev/null; then