diff --git a/src/components/Modal/HWModal.ts b/src/components/Modal/HWModal.ts
index b7ba30a..2b5c482 100644
--- a/src/components/Modal/HWModal.ts
+++ b/src/components/Modal/HWModal.ts
@@ -299,7 +299,7 @@ class HwAssetModal extends BaseModal {
       const prefix = TYPE_PREFIX_MAP[cat] || 'ETC';
       const purchaseDate = (document.getElementById('hw-purchase_date') as HTMLInputElement)?.value || '';
       try {
-        const res = await fetch(`http://${location.hostname}:3000/api/generate-asset-code?prefix=${prefix}&purchaseDate=${purchaseDate}`);
+        const res = await fetch(`/api/generate-asset-code?prefix=${prefix}&purchaseDate=${purchaseDate}`);
         const data = await res.json();
         if (data.nextCode) setFieldValue('hw-asset_code', data.nextCode);
       } catch (err) { console.error('코드 생성 실패:', err); }
@@ -317,7 +317,7 @@ class HwAssetModal extends BaseModal {
       const reader = new FileReader();
       reader.onload = async () => {
         try {
-          const res = await fetch(`http://${location.hostname}:3000/api/upload`, {
+          const res = await fetch(`/api/upload`, {
             method: 'POST',
             headers: { 'Content-Type': 'application/json' },
             body: JSON.stringify({ fileName: file.name, fileData: reader.result })
@@ -326,7 +326,7 @@ class HwAssetModal extends BaseModal {
           if (data.success) {
             setFieldValue('hw-approval_document', data.filePath);
             if (fileLinkContainer) {
-              fileLinkContainer.innerHTML = `<a href="http://${location.hostname}:3000${data.filePath}" target="_blank" class="btn btn-outline btn-sm">[파일 보기]</a>`;
+              fileLinkContainer.innerHTML = `<a href="${data.filePath}" target="_blank" class="btn btn-outline btn-sm">[파일 보기]</a>`;
             }
           }
         } catch (err) { console.error('파일 업로드 실패:', err); alert('파일 업로드 중 오류가 발생했습니다.'); }
@@ -385,7 +385,7 @@ class HwAssetModal extends BaseModal {
         const prefix = TYPE_PREFIX_MAP[cat] || 'ETC';
         const purchaseDate = (document.getElementById('hw-purchase_date') as HTMLInputElement)?.value || '';
         try {
-          const res = await fetch(`http://${location.hostname}:3000/api/generate-asset-code?prefix=${prefix}&purchaseDate=${purchaseDate}`);
+          const res = await fetch(`/api/generate-asset-code?prefix=${prefix}&purchaseDate=${purchaseDate}`);
           const data = await res.json();
           if (data.nextCode) {
             setFieldValue('hw-asset_code', data.nextCode);
@@ -621,7 +621,7 @@ class HwAssetModal extends BaseModal {
     if (docName) docName.textContent = asset.approval_document ? asset.approval_document.split('/').pop() : '파일 선택...';
     const fileLinkContainer = document.getElementById('hw-file-link-container');
     if (fileLinkContainer && asset.approval_document) {
-      fileLinkContainer.innerHTML = `<a href="http://${location.hostname}:3000${asset.approval_document}" target="_blank" class="btn btn-outline btn-sm">[파일 보기]</a>`;
+      fileLinkContainer.innerHTML = `<a href="${asset.approval_document}" target="_blank" class="btn btn-outline btn-sm">[파일 보기]</a>`;
     } else if (fileLinkContainer) {
       fileLinkContainer.innerHTML = '';
     }
diff --git a/src/views/MapEditor.ts b/src/views/MapEditor.ts
index e85c381..bcf34f7 100644
--- a/src/views/MapEditor.ts
+++ b/src/views/MapEditor.ts
@@ -43,7 +43,7 @@ export class MapEditor {
 
   private async loadAssets() {
     try {
-      const res = await fetch(`http://${location.hostname}:3000/api/assets/master`);
+      const res = await fetch(`/api/assets/master`);
       const masterData = await res.json();
       const allHw = [
         ...(masterData.pc || []),