diff --git a/package-lock.json b/package-lock.json
index b9ec180..c580551 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,7 +16,7 @@
         "@fontsource/carter-one": "^5.1.0",
         "@fontsource/ibm-plex-sans-jp": "^5.1.0",
         "astro": "^4.16.10",
-        "github-markdown-css": "^5.7.0",
+        "github-markdown-css": "^5.8.0",
         "rehype-accessible-emojis": "^0.3.2",
         "remark-toc": "^9.0.0",
         "tailwindcss": "^3.4.14",
@@ -4313,10 +4313,9 @@
       }
     },
     "node_modules/github-markdown-css": {
-      "version": "5.7.0",
-      "resolved": "https://registry.npmjs.org/github-markdown-css/-/github-markdown-css-5.7.0.tgz",
-      "integrity": "sha512-GoYhaqELL4YUjz4tZ00PQ4JzFQkMfrBVuEeRB8W74HoikHWNiaGqSgynpwJEc+xom5uf04qoD/tUSS6ziZltaQ==",
-      "license": "MIT",
+      "version": "5.8.0",
+      "resolved": "https://registry.npmjs.org/github-markdown-css/-/github-markdown-css-5.8.0.tgz",
+      "integrity": "sha512-dSyhHzwQw4+5z+JveMY66o4PdbRP7ORjCiR5f1DjIDM5sSSE9rrRG5jpXGgx0PUMJC7goIzLtEJyItT2tL8IsQ==",
       "engines": {
         "node": ">=10"
       },
diff --git a/package.json b/package.json
index 440fe9f..1f486ec 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "@fontsource/carter-one": "^5.1.0",
     "@fontsource/ibm-plex-sans-jp": "^5.1.0",
     "astro": "^4.16.10",
-    "github-markdown-css": "^5.7.0",
+    "github-markdown-css": "^5.8.0",
     "rehype-accessible-emojis": "^0.3.2",
     "remark-toc": "^9.0.0",
     "tailwindcss": "^3.4.14",