diff --git a/app/Services/ESign/PdfSignatureService.php b/app/Services/ESign/PdfSignatureService.php
index ccd00d5f..5116b2fd 100644
--- a/app/Services/ESign/PdfSignatureService.php
+++ b/app/Services/ESign/PdfSignatureService.php
@@ -23,7 +23,12 @@ private function getKoreanFont(): string
 
         $fontPath = '/usr/share/fonts/truetype/nanum/NanumGothic.ttf';
         if (file_exists($fontPath)) {
-            $this->koreanFontName = \TCPDF_FONTS::addTTFfont($fontPath, 'TrueTypeUnicode', '', 96);
+            // 폰트 캐시를 storage에 저장 (vendor 디렉토리 쓰기 권한 문제 방지)
+            $fontCacheDir = storage_path('app/private/fonts');
+            if (! is_dir($fontCacheDir)) {
+                mkdir($fontCacheDir, 0775, true);
+            }
+            $this->koreanFontName = \TCPDF_FONTS::addTTFfont($fontPath, 'TrueTypeUnicode', '', 96, $fontCacheDir.'/');
         }
 
         return $this->koreanFontName ?: 'helvetica';