diff --git a/src/commands/hello.ts b/src/commands/hello.ts
index 3df91b3..0c85f81 100644
--- a/src/commands/hello.ts
+++ b/src/commands/hello.ts
@@ -1,4 +1,4 @@
-import type { Command } from './command.d.ts';
+import type { Command } from '../types/command.js';
 
 const helloCommand: Command = {
   exec: (_: Array<string>): void => {
diff --git a/src/commands/log.ts b/src/commands/log.ts
index 4ea942e..51a0fb7 100644
--- a/src/commands/log.ts
+++ b/src/commands/log.ts
@@ -1,7 +1,7 @@
 import * as fs from "fs";
 import path from "path";
 import zlib from "zlib";
-import type { Command } from '../types/command.d.ts';
+import type { Command } from '../types/command.js';
 
 const logCommand: Command = {
   exec: (_args: Array<string>): void => {
diff --git a/src/gitIndex.ts b/src/gitIndex.ts
index 849ce56..5415761 100644
--- a/src/gitIndex.ts
+++ b/src/gitIndex.ts
@@ -2,7 +2,7 @@ import fs from "fs";
 import path from "path";
 import type { GitIndex, GitIndexEntry, GitIndexExtension } from "./types/gitIndex.d.ts";
 import { createHash } from "crypto";
-import { blob2Hash, GitBlobObject, saveBlob } from "./blob.ts";
+import { blob2Hash, GitBlobObject, saveBlob } from "./blob.js";
 
 export const loadIndex = (): GitIndex => {
   // * Index を Buffer として呼び出し
diff --git a/src/scripts/debug/tree.ts b/src/scripts/debug/tree.ts
index e34a1d8..37790dc 100644
--- a/src/scripts/debug/tree.ts
+++ b/src/scripts/debug/tree.ts
@@ -1,4 +1,3 @@
-import { createHash } from "crypto";
 import { GitTreeObject, loadTree, saveTree } from "../../tree.js";
 
 const testTree: GitTreeObject = {