diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index be4af60..bbca74d 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -1,12 +1,12 @@
 version: 2
 updates:
-  - package-ecosystem: 'github-actions'
-    directory: '/'
+  - package-ecosystem: github-actions
+    directory: /
     schedule:
-      interval: 'daily'
+      interval: daily
       time: '05:00'
-  - package-ecosystem: 'npm'
-    directory: '/'
+  - package-ecosystem: npm
+    directory: /
     schedule:
-      interval: 'daily'
+      interval: daily
       time: '05:00'
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 06fd12b..59236dc 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,5 +1,6 @@
 name: Build package
 on:
+  # eslint-disable-next-line yml/no-empty-mapping-value
   pull_request:
   push:
     branches: main
@@ -17,8 +18,8 @@ jobs:
           ref: ${{ github.event_name == 'pull_request' && github.head_ref || github.ref }}
       - uses: actions/setup-node@v4
         with:
-          node-version: 'latest'
-          cache: 'npm'
+          node-version: latest
+          cache: npm
       - name: Lint, format & build code, generate docs
         run: npm ci
       - name: Commit & push changes
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 939bad0..d2bb577 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -13,10 +13,10 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 'latest'
+          node-version: latest
           registry-url: https://npm.pkg.github.com
           scope: '@olivierzal'
-          cache: 'npm'
+          cache: npm
       - name: Install dependencies
         run: npm ci --ignore-scripts
       - run: npm publish
diff --git a/eslint.config.js b/eslint.config.js
index 79a1f7c..efb5c65 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -5,6 +5,7 @@ import prettier from 'eslint-config-prettier'
 import importPlugin from 'eslint-plugin-import'
 import packageJson from 'eslint-plugin-package-json/configs/recommended'
 import perfectionist from 'eslint-plugin-perfectionist'
+import yml from 'eslint-plugin-yml'
 import ts, { configs as tsConfigs } from 'typescript-eslint'
 
 import { classGroups } from './eslint-utils/class-groups.js'
@@ -370,6 +371,22 @@ const config = [
     },
   ),
   ...markdown.configs.recommended,
+  ...yml.configs['flat/standard'],
+  ...yml.configs['flat/prettier'],
+  {
+    rules: {
+      'yml/block-mapping-colon-indicator-newline': 'error',
+      'yml/file-extension': [
+        'error',
+        {
+          extension: 'yml',
+        },
+      ],
+      'yml/no-multiple-empty-lines': 'error',
+      'yml/no-trailing-zeros': 'error',
+      'yml/require-string-key': 'error',
+    },
+  },
   packageJson,
 ]
 
diff --git a/package-lock.json b/package-lock.json
index b3eacb3..de41eee 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -26,6 +26,7 @@
         "eslint-plugin-import": "^2.31.0",
         "eslint-plugin-package-json": "^0.21.1",
         "eslint-plugin-perfectionist": "^4.7.0",
+        "eslint-plugin-yml": "^1.16.0",
         "jsonc-eslint-parser": "^2.4.0",
         "prettier": "^3.4.2",
         "prettier-plugin-packagejson": "^2.5.8",
@@ -1490,6 +1491,7 @@
       "resolved": "https://registry.npmjs.org/eslint/-/eslint-9.18.0.tgz",
       "integrity": "sha512-+waTfRWQlSbpt3KWE+CjrPPYnbq9kfZIYUqapc0uBXyjTp8aYXZDsUH16m39Ryq3NjAVP4tjuF7KaukeqoCoaA==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.2.0",
         "@eslint-community/regexpp": "^4.12.1",
@@ -1544,6 +1546,22 @@
         }
       }
     },
+    "node_modules/eslint-compat-utils": {
+      "version": "0.6.4",
+      "resolved": "https://registry.npmjs.org/eslint-compat-utils/-/eslint-compat-utils-0.6.4.tgz",
+      "integrity": "sha512-/u+GQt8NMfXO8w17QendT4gvO5acfxQsAKirAt0LVxDnr2N8YLCVbregaNc/Yhp7NM128DwCaRvr8PLDfeNkQw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "semver": "^7.5.4"
+      },
+      "engines": {
+        "node": ">=12"
+      },
+      "peerDependencies": {
+        "eslint": ">=6.0.0"
+      }
+    },
     "node_modules/eslint-config-prettier": {
       "version": "10.0.1",
       "resolved": "https://registry.npmjs.org/eslint-config-prettier/-/eslint-config-prettier-10.0.1.tgz",
@@ -1843,6 +1861,29 @@
         "url": "https://opencollective.com/typescript-eslint"
       }
     },
+    "node_modules/eslint-plugin-yml": {
+      "version": "1.16.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-yml/-/eslint-plugin-yml-1.16.0.tgz",
+      "integrity": "sha512-t4MNCetPjTn18/fUDlQ/wKkcYjnuLYKChBrZ0qUaNqRigVqChHWzTP8SrfFi5s4keX3vdlkWRSu8zHJMdKwxWQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "debug": "^4.3.2",
+        "eslint-compat-utils": "^0.6.0",
+        "lodash": "^4.17.21",
+        "natural-compare": "^1.4.0",
+        "yaml-eslint-parser": "^1.2.1"
+      },
+      "engines": {
+        "node": "^14.17.0 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ota-meshi"
+      },
+      "peerDependencies": {
+        "eslint": ">=6.0.0"
+      }
+    },
     "node_modules/eslint-scope": {
       "version": "8.2.0",
       "resolved": "https://registry.npmjs.org/eslint-scope/-/eslint-scope-8.2.0.tgz",
@@ -2930,6 +2971,13 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/lodash": {
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/lodash.merge": {
       "version": "4.6.2",
       "resolved": "https://registry.npmjs.org/lodash.merge/-/lodash.merge-4.6.2.tgz",
@@ -5098,6 +5146,37 @@
         "node": ">= 14"
       }
     },
+    "node_modules/yaml-eslint-parser": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/yaml-eslint-parser/-/yaml-eslint-parser-1.2.3.tgz",
+      "integrity": "sha512-4wZWvE398hCP7O8n3nXKu/vdq1HcH01ixYlCREaJL5NUMwQ0g3MaGFUBNSlmBtKmhbtVG/Cm6lyYmSVTEVil8A==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "eslint-visitor-keys": "^3.0.0",
+        "lodash": "^4.17.21",
+        "yaml": "^2.0.0"
+      },
+      "engines": {
+        "node": "^14.17.0 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ota-meshi"
+      }
+    },
+    "node_modules/yaml-eslint-parser/node_modules/eslint-visitor-keys": {
+      "version": "3.4.3",
+      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-3.4.3.tgz",
+      "integrity": "sha512-wpc+LXeiyiisxPlEkUzU6svyS1frIO3Mgxj1fdy7Pm8Ygzguax2N3Fa/D/ag1WqbOprdI+uY6wMUl8/a2G+iag==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "engines": {
+        "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/eslint"
+      }
+    },
     "node_modules/yargs": {
       "version": "17.7.2",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-17.7.2.tgz",
diff --git a/package.json b/package.json
index 1fcb69e..42e9a91 100644
--- a/package.json
+++ b/package.json
@@ -51,6 +51,7 @@
     "eslint-plugin-import": "^2.31.0",
     "eslint-plugin-package-json": "^0.21.1",
     "eslint-plugin-perfectionist": "^4.7.0",
+    "eslint-plugin-yml": "^1.16.0",
     "jsonc-eslint-parser": "^2.4.0",
     "prettier": "^3.4.2",
     "prettier-plugin-packagejson": "^2.5.8",