diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
new file mode 100644
index 0000000..a7c7088
--- /dev/null
+++ b/.github/workflows/check.yml
@@ -0,0 +1,22 @@
+name: Checked Code
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+  push:
+    branches: [main]
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Deno
+        uses: denolib/setup-deno@v2
+        with:
+          deno-version: v1.x
+      - name: Test
+        run: deno test --allow-write --allow-read
+      - name: Lint
+        run: deno lint --unstable
+      - name: Format Check
+        run: deno fmt --check --ignore=README.md,README_JP.md,./.github/
\ No newline at end of file
diff --git a/README.md b/README.md
index b5cb843..c1a43ab 100644
--- a/README.md
+++ b/README.md
@@ -68,11 +68,11 @@ Returns an Object that matches the conditions, with the name of the key as the f
 No arguments return all DB data.
 ``` typescript
 // Perfect match
-const data = await db.find("name", "Toika Asomaka");
+const data = db.find("name", "Toika Asomaka");
 // Partial match
-const dataPartial = await db.find("name", /Toika/);
+const dataPartial = db.find("name", /Toika/);
 // All DB data
-const dataAll = await db.find();
+const dataAll = db.find();
 ```
 
 ### Test
diff --git a/README_JP.md b/README_JP.md
index 91c2132..8dfcb21 100644
--- a/README_JP.md
+++ b/README_JP.md
@@ -68,11 +68,11 @@ await db.delete("name", "あそまか といか");
 引数なしは、DBデータすべてを返します。
 ``` typescript
 // 完全一致
-const data = await db.find("name", "あそまか といか");
+const data = db.find("name", "あそまか といか");
 // 部分検索
-const dataPartial = await db.find("name", /といか/);
+const dataPartial = db.find("name", /といか/);
 // すべてのDBデータ
-const dataAll = await db.find();
+const dataAll = db.find();
 ```
 
 ## テスト
diff --git a/mod.test.ts b/mod.test.ts
index 56c3cac..41f06b1 100644
--- a/mod.test.ts
+++ b/mod.test.ts
@@ -40,7 +40,7 @@ const addDb = async (db: BracesDB<Test>): Promise<void> => {
         description: item.description,
         show: item.show,
       },
-      "name"
+      "name",
     );
   }
 };
@@ -58,11 +58,11 @@ Deno.test(
         filename,
       });
       await addDb(db);
-      assertEquals(await db.find(), dataList);
+      assertEquals(db.find(), dataList);
     } finally {
       await deleteDbFile();
     }
-  }
+  },
 );
 
 Deno.test(
@@ -77,11 +77,11 @@ Deno.test(
       await addDb(db);
       await db.delete("name", "Kintaro");
       const dataDeleteList = dataList.filter((item) => item.name !== "Kintaro");
-      assertEquals(await db.find(), dataDeleteList);
+      assertEquals(db.find(), dataDeleteList);
     } finally {
       await deleteDbFile();
     }
-  }
+  },
 );
 
 Deno.test(
@@ -94,13 +94,13 @@ Deno.test(
         filename,
       });
       await addDb(db);
-      const data = await db.find("name", "Kintaro");
+      const data = db.find("name", "Kintaro");
       const dataFindList = dataList.filter((item) => item.name === "Kintaro");
       assertEquals(data, dataFindList);
     } finally {
       await deleteDbFile();
     }
-  }
+  },
 );
 
 Deno.test(
@@ -113,15 +113,13 @@ Deno.test(
         filename,
       });
       await addDb(db);
-      const data = await db.find("name", /taro/);
+      const data = db.find("name", /taro/);
       const dataFindList = dataList.filter((item) =>
         /taro/.test(item.name || "")
       );
-      console.log(data);
-      console.log(dataFindList);
       assertEquals(data, dataFindList);
     } finally {
       await deleteDbFile();
     }
-  }
+  },
 );
diff --git a/mod.ts b/mod.ts
index 0d6da26..7a29b7a 100644
--- a/mod.ts
+++ b/mod.ts
@@ -1,4 +1,9 @@
-import { isExistFileSync, writeFileSync, readFileSync, writeFile } from 'https://github.com/windchime-yk/deno-util/raw/master/mod.ts';
+import {
+  isExistFileSync,
+  readFileSync,
+  writeFile,
+  writeFileSync,
+} from "https://github.com/windchime-yk/deno-util/raw/master/mod.ts";
 
 export type BracesDBOption = {
   /** 
@@ -7,7 +12,7 @@ export type BracesDBOption = {
    * If `memory` is in-memory.  
    * If `file` is generate file
    */
-  type: 'memory' | 'file',
+  type: "memory" | "file";
   /**
    * Folder path.  
    * It is generated in the project root by default.  
@@ -15,36 +20,41 @@ export type BracesDBOption = {
    * 
    * ex. db/store/
    */
-  folder?: string,
+  folder?: string;
   /**
    * File Name.  
    * Saved `{filename}.db` .  
    * The default name is `main` .  
    * If the type is `memory`, you don't need it.
    */
-  filename?: string
-}
+  filename?: string;
+};
 
 export class BracesDB<T> {
-  private readonly type: string
-  private readonly folder?: string
-  private readonly file: string
-  private data: T[]
+  private readonly type: string;
+  private readonly folder?: string;
+  private readonly file: string;
+  private data: T[];
 
   constructor(option: BracesDBOption) {
-    const { type, folder = './', filename = 'main' } = option
+    const { type, folder = "./", filename = "main" } = option;
 
-    this.type = type
-    this.folder = folder
-    this.file = `${folder}${folder?.slice(-1) === '/' ? '' : '/'}${filename}.db`
-    this.data = []
+    this.type = type;
+    this.folder = folder;
+    this.file = `${folder}${
+      folder?.slice(-1) === "/" ? "" : "/"
+    }${filename}.db`;
+    this.data = [];
 
-    if (this.folder && !isExistFileSync(this.folder)) Deno.mkdirSync(this.folder, { recursive: true })
-    if (this.folder && !isExistFileSync(this.file) && this.type === 'file')
-      writeFileSync(JSON.stringify(this.data), this.file)
+    if (this.folder && !isExistFileSync(this.folder)) {
+      Deno.mkdirSync(this.folder, { recursive: true });
+    }
+    if (this.folder && !isExistFileSync(this.file) && this.type === "file") {
+      writeFileSync(JSON.stringify(this.data), this.file);
+    }
     if (isExistFileSync(this.file)) {
-      const json: T[] = JSON.parse(readFileSync(this.file))
-      this.data = json
+      const json: T[] = JSON.parse(readFileSync(this.file));
+      this.data = json;
     }
   }
 
@@ -54,11 +64,14 @@ export class BracesDB<T> {
    * @param keyword Use the specified key to prevent duplication
    */
   async add(object: T, keyword: keyof T) {
-    const isDuplicate = this.data.filter(item => item[keyword] === object[keyword]).length
-    if (isDuplicate) return
+    const isDuplicate =
+      this.data.filter((item) => item[keyword] === object[keyword]).length;
+    if (isDuplicate) return;
 
-    this.data.push(object)
-    if (this.type === 'file') await writeFile(JSON.stringify(this.data), this.file)
+    this.data.push(object);
+    if (this.type === "file") {
+      await writeFile(JSON.stringify(this.data), this.file);
+    }
   }
 
   /**
@@ -67,9 +80,11 @@ export class BracesDB<T> {
    * @param keyword Wording of search conditions
    */
   async delete(key: keyof T, keyword: T[keyof T]) {
-    const candidate = this.data.filter(item => item[key] !== keyword)
-    this.data = candidate
-    if (this.type === 'file') await writeFile(JSON.stringify(candidate), this.file)
+    const candidate = this.data.filter((item) => item[key] !== keyword);
+    this.data = candidate;
+    if (this.type === "file") {
+      await writeFile(JSON.stringify(candidate), this.file);
+    }
   }
 
   /**
@@ -77,9 +92,11 @@ export class BracesDB<T> {
    * @param key The key of the Object you want to search
    * @param keyword Wording of search conditions
    */
-  async find(key?: keyof T, keyword?: T[keyof T] | RegExp) {
-    if (key && keyword instanceof RegExp) return this.data.filter(item => keyword.test(`${item[key]}`))
-    else if (key && keyword) return this.data.filter(item => item[key] === keyword)
-    else return this.data
+  find(key?: keyof T, keyword?: T[keyof T] | RegExp) {
+    if (key && keyword instanceof RegExp) {
+      return this.data.filter((item) => keyword.test(`${item[key]}`));
+    } else if (key && keyword) {
+      return this.data.filter((item) => item[key] === keyword);
+    } else return this.data;
   }
-}
\ No newline at end of file
+}