diff --git a/frontend/components/admin/dashboard/data-sources/DatabaseConfig.tsx b/frontend/components/admin/dashboard/data-sources/DatabaseConfig.tsx
index 31e6ff7d..ff190184 100644
--- a/frontend/components/admin/dashboard/data-sources/DatabaseConfig.tsx
+++ b/frontend/components/admin/dashboard/data-sources/DatabaseConfig.tsx
@@ -150,7 +150,7 @@ export function DatabaseConfig({ dataSource, onChange }: DatabaseConfigProps) {
                 <SelectTrigger className="w-full">
                   <SelectValue placeholder="커넥션을 선택하세요" />
                 </SelectTrigger>
-                <SelectContent>
+                <SelectContent className="z-[9999]">
                   {connections.map((conn) => (
                     <SelectItem key={conn.id} value={String(conn.id)}>
                       <div className="flex items-center gap-2">
diff --git a/frontend/components/admin/dashboard/widgets/yard-3d/YardEditor.tsx b/frontend/components/admin/dashboard/widgets/yard-3d/YardEditor.tsx
index 9c85799e..8dd82e5d 100644
--- a/frontend/components/admin/dashboard/widgets/yard-3d/YardEditor.tsx
+++ b/frontend/components/admin/dashboard/widgets/yard-3d/YardEditor.tsx
@@ -180,7 +180,7 @@ export default function YardEditor({ layout, onBack }: YardEditorProps) {
   };
 
   // 자재 배치 해제
-  const handlePlacementRemove = async (id: number) => {
+  const handlePlacementRemove = async (id: number): Promise<void> => {
     try {
       const response = await yardLayoutApi.removePlacement(id);
       if (response.success) {