diff --git a/packages/sit-onyx/.storybook/main.ts b/packages/sit-onyx/.storybook/main.ts
index f2b16f53e..1cd144eeb 100644
--- a/packages/sit-onyx/.storybook/main.ts
+++ b/packages/sit-onyx/.storybook/main.ts
@@ -3,7 +3,7 @@ import { mergeConfig } from "vite";
 
 const config: StorybookConfig = {
   stories: ["./pages/*.mdx", "../src/**/*.stories.ts"],
-  addons: ["@storybook/addon-essentials", "storybook-dark-mode"],
+  addons: ["@storybook/addon-essentials", "storybook-dark-mode", "@storybook/addon-a11y"],
   staticDirs: ["./public"],
   framework: {
     name: "@storybook/vue3-vite",
diff --git a/packages/sit-onyx/package.json b/packages/sit-onyx/package.json
index 3ea224ac8..1a5d29354 100644
--- a/packages/sit-onyx/package.json
+++ b/packages/sit-onyx/package.json
@@ -55,5 +55,8 @@
     "sass": "catalog:",
     "vue": "catalog:",
     "vue-component-type-helpers": "^2.1.6"
+  },
+  "dependencies": {
+    "@storybook/addon-a11y": "^8.3.4"
   }
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index a82837d8d..7daf9f328 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -318,6 +318,9 @@ importers:
       '@sit-onyx/icons':
         specifier: workspace:^
         version: link:../icons
+      '@storybook/addon-a11y':
+        specifier: ^8.3.4
+        version: 8.3.4(storybook@8.3.4)
       typescript:
         specifier: '>= 5.2.2'
         version: 5.6.2
@@ -1864,6 +1867,11 @@ packages:
     resolution: {integrity: sha512-LtoMMhxAlorcGhmFYI+LhPgbPZCkgP6ra1YL604EeF6U98pLlQ3iWIGMdWSC+vWmPBWBNgmDBAhnAobLROJmwg==}
     engines: {node: '>=18'}
 
+  '@storybook/addon-a11y@8.3.4':
+    resolution: {integrity: sha512-mbLAJ9vW879Fq66zTUp7Gn7GQ9ZieYDj90ngMsZIjX42SsJEkeIrwbpkwbHlJBlWm2cm7hcF+BrULI0CmTIFpQ==}
+    peerDependencies:
+      storybook: ^8.3.4
+
   '@storybook/addon-actions@8.3.4':
     resolution: {integrity: sha512-1y0yD3upKcyzNwwA6loAGW2cRDqExwl4oAT7GJQA4tmabI+fNwmANSgU/ezLvvSUf4Qo0eJHg2Zcn8y+Apq2eA==}
     peerDependencies:
@@ -8021,6 +8029,12 @@ snapshots:
 
   '@sindresorhus/merge-streams@2.3.0': {}
 
+  '@storybook/addon-a11y@8.3.4(storybook@8.3.4)':
+    dependencies:
+      '@storybook/addon-highlight': 8.3.4(storybook@8.3.4)
+      axe-core: 4.10.0
+      storybook: 8.3.4
+
   '@storybook/addon-actions@8.3.4(storybook@8.3.4)':
     dependencies:
       '@storybook/global': 5.0.0