diff --git a/package-lock.json b/package-lock.json
index 03b7ac4b8..d3748c7cb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17,7 +17,7 @@
         "concurrently": "^9.2.1",
         "express": "^5.2.1",
         "fast-glob": "^3.3.3",
-        "github-markdown-css": "^5.8.1",
+        "github-markdown-css": "^5.9.0",
         "handlebars": "^4.7.8",
         "showdown": "^2.1.0",
         "showdown-footnotes": "^2.1.2",
@@ -12526,9 +12526,9 @@
       }
     },
     "node_modules/github-markdown-css": {
-      "version": "5.8.1",
-      "resolved": "https://registry.npmjs.org/github-markdown-css/-/github-markdown-css-5.8.1.tgz",
-      "integrity": "sha512-8G+PFvqigBQSWLQjyzgpa2ThD9bo7+kDsriUIidGcRhXgmcaAWUIpCZf8DavJgc+xifjbCG+GvMyWr0XMXmc7g==",
+      "version": "5.9.0",
+      "resolved": "https://registry.npmjs.org/github-markdown-css/-/github-markdown-css-5.9.0.tgz",
+      "integrity": "sha512-tmT5sY+zvg2302XLYEfH2mtkViIM1SWf2nvYoF5N1ZsO0V6B2qZTiw3GOzw4vpjLygK/KG35qRlPFweHqfzz5w==",
       "dev": true,
       "license": "MIT",
       "engines": {
diff --git a/package.json b/package.json
index adaaf289f..114283f34 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "concurrently": "^9.2.1",
     "express": "^5.2.1",
     "fast-glob": "^3.3.3",
-    "github-markdown-css": "^5.8.1",
+    "github-markdown-css": "^5.9.0",
     "handlebars": "^4.7.8",
     "showdown": "^2.1.0",
     "showdown-footnotes": "^2.1.2",