diff --git a/biome.json b/biome.json
new file mode 100644
index 0000000..5a4a2d5
--- /dev/null
+++ b/biome.json
@@ -0,0 +1,58 @@
+{
+    "$schema": "./node_modules/@biomejs/biome/configuration_schema.json",
+    "vcs": {
+        "enabled": false,
+        "clientKind": "git",
+        "useIgnoreFile": false
+    },
+    "files": {
+        "ignoreUnknown": false,
+        "includes": [
+            "**",
+            "!node_modules",
+            "!vendor",
+            "!composer.json",
+            "!composer.lock",
+            "!package.json",
+            "!package-lock.json",
+            "!analytics.*",
+            "!metrics.*",
+            "!coverage",
+            "!dist"
+        ]
+    },
+    "formatter": {
+        "enabled": true,
+        "indentStyle": "space",
+        "indentWidth": 4
+    },
+    "linter": {
+        "enabled": true,
+        "rules": {
+            "recommended": true
+        }
+    },
+    "javascript": {
+        "formatter": {
+            "quoteStyle": "double"
+        }
+    },
+    "json": {
+        "formatter": {
+            "enabled": true,
+            "bracketSpacing": true,
+            "expand": "always"
+        },
+        "parser": {
+            "allowComments": true
+        }
+    },
+    "assist": {
+        "enabled": true,
+        "actions": {
+            "source": {
+                "organizeImports": "on"
+            }
+        }
+    }
+}
diff --git a/dist/index.js b/dist/index.js
index b9c3b9f..8047e36 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -34392,7 +34392,6 @@ const previewUpdater = async () => {
         repository: {
             owner: github_1.context.repo.owner,
             repo: github_1.context.repo.repo,
-            octokit: (0, github_1.getOctokit)(token),
         },
     }, configPath);
     // Read names
@@ -34404,7 +34403,7 @@ const previewUpdater = async () => {
     // Show working directory
     (0, core_1.info)(`Working directory: ${config.directory}`);
     // Authenticate
-    const repo = new repository_1.Repository(config);
+    const repo = new repository_1.Repository(config, (0, github_1.getOctokit)(token));
     await repo.authenticate();
     // Read file
     const content = (0, filesystem_1.readFile)(config, config.path.readme);
@@ -34463,8 +34462,8 @@ exports.defaultConfig = {
             fontSize: "100px",
             icon: "code",
             packageManager: "auto",
-            packageName: undefined,
             packageGlobal: false,
+            packageName: undefined,
             title: undefined,
             description: undefined,
         },
@@ -34754,7 +34753,8 @@ const setPreview = (content, config) => {
         content = `# ${title}\n\n${content}`;
     }
     const images = (0, image_1.getImages)(config);
-    return cleanUp(content).replace(/^(#\s+.+[\n\s]+)/, "$1" + images + "\n\n");
+    const replace = "$1";
+    return cleanUp(content).replace(/^(#\s+.+[\n\s]+)/, `${replace}${images}\n\n`);
 };
 exports.setPreview = setPreview;
 
@@ -34791,10 +34791,11 @@ exports.Repository = void 0;
 const filesystem_1 = __nccwpck_require__(9742);
 const randomizer_1 = __nccwpck_require__(3678);
 class Repository {
-    constructor(config) {
-        this._currentBranch = '';
+    constructor(config, octokit) {
+        this._currentBranch = "";
         this._newBranch = false;
         this._config = config;
+        this._octokit = octokit;
     }
     async authenticate() {
         try {
@@ -34829,17 +34830,17 @@ class Repository {
     async checkoutBranch(isNew) {
         try {
             this._newBranch = isNew;
-            await (0, filesystem_1.exec)(`git switch ${isNew ? '-c' : ''} "${this.branchName()}"`);
+            await (0, filesystem_1.exec)(`git switch ${isNew ? "-c" : ""} "${this.branchName()}"`);
         }
         catch (error) {
             // @ts-expect-error
-            error.message = `Error checking out ${isNew ? 'new' : 'existing'} branch "${this.branchName()}": ${error.message}`;
+            error.message = `Error checking out ${isNew ? "new" : "existing"} branch "${this.branchName()}": ${error.message}`;
             throw error;
         }
     }
     async stage() {
         try {
-            await (0, filesystem_1.exec)('git add ' + this._config.path.readme);
+            await (0, filesystem_1.exec)(`git add ${this._config.path.readme}`);
         }
         catch (error) {
             // @ts-expect-error
@@ -34850,7 +34851,7 @@ class Repository {
     async commit() {
         try {
             const message = this._config.repository.commit.title +
-                '\n' +
+                "\n" +
                 this._config.repository.commit.body;
             await (0, filesystem_1.exec)(`git commit -m "${message}"`);
         }
@@ -34862,7 +34863,7 @@ class Repository {
     }
     async push() {
         try {
-            let cmd = 'git push';
+            let cmd = "git push";
             if (this._newBranch) {
                 cmd += ` --set-upstream origin ${this.branchName()}`;
             }
@@ -34877,13 +34878,13 @@ class Repository {
     async createPullRequest() {
         try {
             const defaultBranch = await (0, filesystem_1.exec)(`git remote show origin | grep 'HEAD branch' | cut -d ' ' -f5`);
-            return this._config.repository.octokit.rest.pulls.create({
+            return this._octokit.rest.pulls.create({
                 owner: this._config.repository.owner,
                 repo: this._config.repository.repo,
                 title: this._config.repository.pullRequest.title,
                 body: this._config.repository.pullRequest.body,
                 head: this.branchName(),
-                base: defaultBranch
+                base: defaultBranch,
             });
         }
         catch (error) {
@@ -34894,11 +34895,11 @@ class Repository {
     }
     async assignee(issueNumber, assignees) {
         try {
-            return this._config.repository.octokit.rest.issues.addAssignees({
+            return this._octokit.rest.issues.addAssignees({
                 owner: this._config.repository.owner,
                 repo: this._config.repository.repo,
                 issue_number: issueNumber,
-                assignees: assignees
+                assignees: assignees,
             });
         }
         catch (error) {
@@ -34909,11 +34910,11 @@ class Repository {
     }
     async addLabels(issueNumber, labels) {
         try {
-            return this._config.repository.octokit.rest.issues.addLabels({
+            return this._octokit.rest.issues.addLabels({
                 owner: this._config.repository.owner,
                 repo: this._config.repository.repo,
                 issue_number: issueNumber,
-                labels
+                labels,
             });
         }
         catch (error) {
@@ -34923,8 +34924,8 @@ class Repository {
         }
     }
     branchName() {
-        if (this._currentBranch === '') {
-            this._currentBranch = this._config.repository.commit.branch.replace('{random}', (0, randomizer_1.randomizer)());
+        if (this._currentBranch === "") {
+            this._currentBranch = this._config.repository.commit.branch.replace("{random}", (0, randomizer_1.randomizer)());
         }
         return this._currentBranch;
     }
diff --git a/package.json b/package.json
index 254361b..cacff3a 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,10 @@
         "dev": "npm run build && node dist/index.js",
         "coverage": "jest --coverage",
         "test": "jest",
-        "type-check": "tsc --noEmit"
+        "type-check": "tsc --noEmit",
+        "lint": "npx @biomejs/biome lint --write",
+        "format": "npx @biomejs/biome format --write",
+        "style": "npm run lint && npm run format"
     },
     "keywords": [
         "preview",
diff --git a/src/main.ts b/src/main.ts
index cff1e2c..774787c 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -21,7 +21,6 @@ const previewUpdater = async () => {
             repository: {
                 owner: context.repo.owner,
                 repo: context.repo.repo,
-                octokit: getOctokit(token),
             },
         },
         configPath,
@@ -39,7 +38,7 @@ const previewUpdater = async () => {
     info(`Working directory: ${config.directory}`);
 
     // Authenticate
-    const repo = new Repository(config);
+    const repo = new Repository(config, getOctokit(token));
     await repo.authenticate();
 
     // Read file
diff --git a/src/types/config.ts b/src/types/config.ts
index 739d688..371cc22 100644
--- a/src/types/config.ts
+++ b/src/types/config.ts
@@ -39,7 +39,6 @@ export interface PullRequest {
 export interface Repository {
     owner?: string;
     repo?: string;
-    octokit?: any;
 
     commit: Commit;
     pullRequest: PullRequest;
diff --git a/src/utils/preview.ts b/src/utils/preview.ts
index dbda915..1824438 100644
--- a/src/utils/preview.ts
+++ b/src/utils/preview.ts
@@ -19,5 +19,10 @@ export const setPreview = (content: string, config: Config) => {
 
     const images: string = getImages(config);
 
-    return cleanUp(content).replace(/^(#\s+.+[\n\s]+)/, "$1" + images + "\n\n");
+    const replace = "$1";
+
+    return cleanUp(content).replace(
+        /^(#\s+.+[\n\s]+)/,
+        `${replace}${images}\n\n`,
+    );
 };
diff --git a/src/utils/repository.ts b/src/utils/repository.ts
index 18d3dec..142c1ef 100644
--- a/src/utils/repository.ts
+++ b/src/utils/repository.ts
@@ -1,14 +1,18 @@
 import type { Config } from "../types/config";
 import { exec } from "./filesystem";
 import { randomizer } from "./randomizer";
+import type { GitHub } from "@actions/github/lib/utils";
+import type { RestEndpointMethodTypes } from "@octokit/plugin-rest-endpoint-methods/dist-types/generated/parameters-and-response-types";
 
 export class Repository {
     private _config: Config;
     private _currentBranch: string = "";
     private _newBranch: boolean = false;
+    private _octokit: InstanceType<typeof GitHub>;
 
-    constructor(config: Config) {
+    constructor(config: Config, octokit: InstanceType<typeof GitHub>) {
         this._config = config;
+        this._octokit = octokit;
     }
 
     async authenticate() {
@@ -69,7 +73,7 @@ export class Repository {
 
     async stage() {
         try {
-            await exec("git add " + this._config.path.readme);
+            await exec(`git add ${this._config.path.readme}`);
         } catch (error) {
             // @ts-expect-error
             error.message = `Error staging file "${this._config.path.readme}": ${error.message}`;
@@ -117,7 +121,9 @@ export class Repository {
                 `git remote show origin | grep 'HEAD branch' | cut -d ' ' -f5`,
             );
 
-            return this._config.repository.octokit.rest.pulls.create({
+            return this._octokit.rest.pulls.create(<
+                RestEndpointMethodTypes["pulls"]["create"]["parameters"]
+            >{
                 owner: this._config.repository.owner,
                 repo: this._config.repository.repo,
                 title: this._config.repository.pullRequest.title,
@@ -135,7 +141,9 @@ export class Repository {
 
     async assignee(issueNumber: number, assignees: string[]) {
         try {
-            return this._config.repository.octokit.rest.issues.addAssignees({
+            return this._octokit.rest.issues.addAssignees(<
+                RestEndpointMethodTypes["issues"]["addAssignees"]["parameters"]
+            >{
                 owner: this._config.repository.owner,
                 repo: this._config.repository.repo,
                 issue_number: issueNumber,
@@ -151,7 +159,9 @@ export class Repository {
 
     async addLabels(issueNumber: number, labels: string[]) {
         try {
-            return this._config.repository.octokit.rest.issues.addLabels({
+            return this._octokit.rest.issues.addLabels(<
+                RestEndpointMethodTypes["issues"]["addLabels"]["parameters"]
+            >{
                 owner: this._config.repository.owner,
                 repo: this._config.repository.repo,
                 issue_number: issueNumber,
diff --git a/tests/helpers/filesystem.ts b/tests/helpers/filesystem.ts
index 82562d9..bbee0af 100644
--- a/tests/helpers/filesystem.ts
+++ b/tests/helpers/filesystem.ts
@@ -3,7 +3,7 @@ import { setPreview } from "../../src/utils/preview";
 import { testConfig } from "./config";
 
 export const getReadme = (filename: string): string => {
-    const content = readFile(testConfig, "tests/fixtures/readme/" + filename);
+    const content = readFile(testConfig, `tests/fixtures/readme/${filename}`);
 
     return setPreview(content, testConfig);
 };