diff --git a/package.json b/package.json
index 860e8e25..e042320f 100644
--- a/package.json
+++ b/package.json
@@ -67,7 +67,7 @@
     "@types/web": "^0.0.127",
     "@vitest/coverage-istanbul": "^1.0.4",
     "domiso": "link:.",
-    "github-markdown-css": "^5.5.0",
+    "github-markdown-css": "^5.6.0",
     "jsdom": "^23.0.1",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 64872885..70ffb7e9 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -56,8 +56,8 @@ devDependencies:
     specifier: link:.
     version: 'link:'
   github-markdown-css:
-    specifier: ^5.5.0
-    version: 5.5.0
+    specifier: ^5.6.0
+    version: 5.6.0
   jsdom:
     specifier: ^23.0.1
     version: 23.0.1(patch_hash=c4vz5hwxbqpkrhc7f5hqkxfedi)
@@ -9768,8 +9768,8 @@ packages:
       through2: 4.0.2
     dev: true
 
-  /github-markdown-css@5.5.0:
-    resolution: {integrity: sha512-Ncp4putm+cGteDhtNYKGdchM4uiIm5tmQcAQx/eEYhuM0sOdjZYNQOauQTaodjDQjfw7whU99MijwC1M0FUY4w==}
+  /github-markdown-css@5.6.0:
+    resolution: {integrity: sha512-bI+F5IeR/Ziqg06nmM2nUWBPbZKJRktDRhgAZXYTOHJYy0i4z43cvQAIySr4frpT7eoOuvzVdUbeaPOR2xCNFQ==}
     engines: {node: '>=10'}
     dev: true