diff --git a/package-lock.json b/package-lock.json
index 61f30c18..af9aad24 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,8 +16,7 @@
         "textlint": "^14.0.4",
         "textlint-filter-rule-comments": "^1.2.2",
         "textlint-rule-preset-ja-spacing": "^2.4.3",
-        "textlint-rule-preset-ja-technical-writing": "^10.0.1",
-        "toml": "^3.0.0"
+        "textlint-rule-preset-ja-technical-writing": "^10.0.1"
       }
     },
     "node_modules/@azu/format-text": {
@@ -4521,13 +4520,6 @@
         "node": ">=0.10.0"
       }
     },
-    "node_modules/toml": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/toml/-/toml-3.0.0.tgz",
-      "integrity": "sha512-y/mWCZinnvxjTKYhJ+pYxwD0mRLVvOtdS2Awbgxln6iEnt4rk0yBxeSBHkGJcPucRiG0e55mwWp+g/05rsrd6w==",
-      "dev": true,
-      "license": "MIT"
-    },
     "node_modules/traverse": {
       "version": "0.6.9",
       "resolved": "https://registry.npmjs.org/traverse/-/traverse-0.6.9.tgz",
diff --git a/scripts/generate-ogp.mjs b/scripts/generate-ogp.mjs
index 1af56319..fa00eda1 100644
--- a/scripts/generate-ogp.mjs
+++ b/scripts/generate-ogp.mjs
@@ -72,6 +72,7 @@ function extractMetadata(filePath, content) {
 
 /**
  * SVGをPNGに変換
+ * 高品質レンダリングオプションを使用
  */
 function svgToPng(svg) {
   const resvg = new Resvg(svg, {
@@ -79,6 +80,12 @@ function svgToPng(svg) {
       mode: 'width',
       value: 1200,
     },
+    font: {
+      loadSystemFonts: false, // システムフォント読み込みを無効化してパフォーマンス向上
+    },
+    shapeRendering: 2, // 0: optimizeSpeed, 1: crispEdges, 2: geometricPrecision
+    textRendering: 2,  // 0: optimizeSpeed, 1: optimizeLegibility, 2: geometricPrecision
+    imageRendering: 2, // 0: optimizeSpeed, 1: optimizeQuality
   });
 
   const pngData = resvg.render();