diff --git a/package.json b/package.json
index 0620a07..23a2d74 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@technote-space/github-action-config-helper",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "description": "Helper for GitHub Action to manage config.",
   "author": {
     "name": "Technote",
@@ -28,10 +28,11 @@
   "dependencies": {
     "@actions/github": "^3.0.0",
     "@octokit/plugin-rest-endpoint-methods": "^4.0.0",
+    "@technote-space/github-action-helper": "^3.0.1",
     "js-yaml": "^3.14.0"
   },
   "devDependencies": {
-    "@technote-space/github-action-test-helper": "^0.4.0",
+    "@technote-space/github-action-test-helper": "^0.5.0",
     "@types/jest": "^26.0.3",
     "@types/node": "^14.0.14",
     "@typescript-eslint/eslint-plugin": "^3.4.0",
diff --git a/src/utils.ts b/src/utils.ts
index 47bd3ac..cb2728d 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,11 +1,12 @@
 import {join} from 'path';
-import {RestEndpointMethods} from '@octokit/plugin-rest-endpoint-methods/dist-types/generated/method-types';
 import {Context} from '@actions/github/lib/context';
+import {Octokit} from '@technote-space/github-action-helper/dist/types';
+import {RestEndpointMethods} from '@octokit/plugin-rest-endpoint-methods/dist-types/generated/method-types';
 import {parseConfig} from './misc';
 import {NOT_FOUND_STATUS} from './constant';
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
-export const getConfig = async(fileName: string, octokit: RestEndpointMethods, context: Context, options: { configPath?: string; ref?: string } = {}): Promise<{ [key: string]: any } | false> | never => {
+export const getConfig = async(fileName: string, octokit: Octokit, context: Context, options: { configPath?: string; ref?: string } = {}): Promise<{ [key: string]: any } | false> | never => {
   const {configPath = '.github', ref} = options;
   try {
     const params: {
@@ -21,7 +22,7 @@ export const getConfig = async(fileName: string, octokit: RestEndpointMethods, c
     if (ref) {
       params.ref = ref;
     }
-    return parseConfig((await octokit.repos.getContent(params)).data['content']);
+    return parseConfig((await (octokit as RestEndpointMethods).repos.getContent(params)).data['content']);
   } catch (error) {
     if (error.status && NOT_FOUND_STATUS === error.status) {
       return false;
diff --git a/yarn.lock b/yarn.lock
index 139fc0b..a40450d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,6 +2,11 @@
 # yarn lockfile v1
 
 
+"@actions/core@^1.2.4":
+  version "1.2.4"
+  resolved "https://registry.yarnpkg.com/@actions/core/-/core-1.2.4.tgz#96179dbf9f8d951dd74b40a0dbd5c22555d186ab"
+  integrity sha512-YJCEq8BE3CdN8+7HPZ/4DxJjk/OkZV2FFIf+DlZTC/4iBlzYCD5yjRR6eiOS5llO11zbRltIRuKAjMKaWTE6cg==
+
 "@actions/github@^3.0.0":
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/@actions/github/-/github-3.0.0.tgz#ce1b721a266ad5ac522da0c9c013c999009604bf"
@@ -500,18 +505,6 @@
     before-after-hook "^2.1.0"
     universal-user-agent "^5.0.0"
 
-"@octokit/core@^3.0.0":
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/@octokit/core/-/core-3.1.0.tgz#9c3c9b23f7504668cfa057f143ccbf0c645a0ac9"
-  integrity sha512-yPyQSmxIXLieEIRikk2w8AEtWkFdfG/LXcw1KvEtK3iP0ENZLW/WYQmdzOKqfSaLhooz4CJ9D+WY79C8ZliACw==
-  dependencies:
-    "@octokit/auth-token" "^2.4.0"
-    "@octokit/graphql" "^4.3.1"
-    "@octokit/request" "^5.4.0"
-    "@octokit/types" "^5.0.0"
-    before-after-hook "^2.1.0"
-    universal-user-agent "^5.0.0"
-
 "@octokit/endpoint@^6.0.1":
   version "6.0.3"
   resolved "https://registry.yarnpkg.com/@octokit/endpoint/-/endpoint-6.0.3.tgz#dd09b599662d7e1b66374a177ab620d8cdf73487"
@@ -537,19 +530,6 @@
   dependencies:
     "@octokit/types" "^5.0.0"
 
-"@octokit/plugin-request-log@^1.0.0":
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/@octokit/plugin-request-log/-/plugin-request-log-1.0.0.tgz#eef87a431300f6148c39a7f75f8cfeb218b2547e"
-  integrity sha512-ywoxP68aOT3zHCLgWZgwUJatiENeHE7xJzYjfz8WI0goynp96wETBF+d95b8g/uL4QmS6owPVlaxiz3wyMAzcw==
-
-"@octokit/plugin-rest-endpoint-methods@4.0.0", "@octokit/plugin-rest-endpoint-methods@^4.0.0":
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/@octokit/plugin-rest-endpoint-methods/-/plugin-rest-endpoint-methods-4.0.0.tgz#b02a2006dda8e908c3f8ab381dd5475ef5a810a8"
-  integrity sha512-emS6gysz4E9BNi9IrCl7Pm4kR+Az3MmVB0/DoDCmF4U48NbYG3weKyDlgkrz6Jbl4Mu4nDx8YWZwC4HjoTdcCA==
-  dependencies:
-    "@octokit/types" "^5.0.0"
-    deprecation "^2.3.1"
-
 "@octokit/plugin-rest-endpoint-methods@^3.10.0":
   version "3.17.0"
   resolved "https://registry.yarnpkg.com/@octokit/plugin-rest-endpoint-methods/-/plugin-rest-endpoint-methods-3.17.0.tgz#d8ba04eb883849dd98666c55bf49d8c9fe7be055"
@@ -558,6 +538,14 @@
     "@octokit/types" "^4.1.6"
     deprecation "^2.3.1"
 
+"@octokit/plugin-rest-endpoint-methods@^4.0.0":
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/@octokit/plugin-rest-endpoint-methods/-/plugin-rest-endpoint-methods-4.0.0.tgz#b02a2006dda8e908c3f8ab381dd5475ef5a810a8"
+  integrity sha512-emS6gysz4E9BNi9IrCl7Pm4kR+Az3MmVB0/DoDCmF4U48NbYG3weKyDlgkrz6Jbl4Mu4nDx8YWZwC4HjoTdcCA==
+  dependencies:
+    "@octokit/types" "^5.0.0"
+    deprecation "^2.3.1"
+
 "@octokit/request-error@^2.0.0":
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/@octokit/request-error/-/request-error-2.0.2.tgz#0e76b83f5d8fdda1db99027ea5f617c2e6ba9ed0"
@@ -581,16 +569,6 @@
     once "^1.4.0"
     universal-user-agent "^5.0.0"
 
-"@octokit/rest@^18.0.0":
-  version "18.0.0"
-  resolved "https://registry.yarnpkg.com/@octokit/rest/-/rest-18.0.0.tgz#7f401d9ce13530ad743dfd519ae62ce49bcc0358"
-  integrity sha512-4G/a42lry9NFGuuECnua1R1eoKkdBYJap97jYbWDNYBOUboWcM75GJ1VIcfvwDV/pW0lMPs7CEmhHoVrSV5shg==
-  dependencies:
-    "@octokit/core" "^3.0.0"
-    "@octokit/plugin-paginate-rest" "^2.2.0"
-    "@octokit/plugin-request-log" "^1.0.0"
-    "@octokit/plugin-rest-endpoint-methods" "4.0.0"
-
 "@octokit/types@^4.1.6":
   version "4.1.10"
   resolved "https://registry.yarnpkg.com/@octokit/types/-/types-4.1.10.tgz#e4029c11e2cc1335051775bc1600e7e740e4aca4"
@@ -619,14 +597,24 @@
   dependencies:
     "@sinonjs/commons" "^1.7.0"
 
-"@technote-space/github-action-test-helper@^0.4.0":
-  version "0.4.0"
-  resolved "https://registry.yarnpkg.com/@technote-space/github-action-test-helper/-/github-action-test-helper-0.4.0.tgz#ad52697904c1a540fdbbc1241b1a1b6b6489d04e"
-  integrity sha512-xiaDI/f0fjM+n/lY8cYK7438bgc8fVpxieVghGDUiGX3WI9cRVaMc4S3oSGNvhx62vKPH4dVb2IVqjhsS1FjZg==
+"@technote-space/github-action-helper@^3.0.1":
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/@technote-space/github-action-helper/-/github-action-helper-3.0.1.tgz#6a42b9b0ebb512661e0a9c7e0937fe35962e52f6"
+  integrity sha512-LQJZ6d5mLbuHt/DeuecY/EpHpmG+WrxwT0YgVmTz+TioAcihVUB0pipvuf9OITx4R4wrfEkrsGdzZzsf3oWNIw==
+  dependencies:
+    "@actions/core" "^1.2.4"
+    "@actions/github" "^3.0.0"
+    "@octokit/plugin-rest-endpoint-methods" "^4.0.0"
+    shell-escape "^0.2.0"
+    sprintf-js "^1.1.2"
+
+"@technote-space/github-action-test-helper@^0.5.0":
+  version "0.5.0"
+  resolved "https://registry.yarnpkg.com/@technote-space/github-action-test-helper/-/github-action-test-helper-0.5.0.tgz#8a355a89d3b75237a6968ad55a3c51e767e89944"
+  integrity sha512-G84qLpP0R/ot2c+AiY5Xs5hsoW88gajnOfnsS+en9Fo1eZbFz7Ws19epL/zf/LMZptZjeqfzQwjJZxqqbVAsyg==
   dependencies:
     "@actions/github" "^3.0.0"
     "@octokit/plugin-rest-endpoint-methods" "^4.0.0"
-    "@octokit/rest" "^18.0.0"
     js-yaml "^3.14.0"
 
 "@types/babel__core@^7.0.0", "@types/babel__core@^7.1.7":
@@ -3577,6 +3565,11 @@ shebang-regex@^3.0.0:
   resolved "https://registry.yarnpkg.com/shebang-regex/-/shebang-regex-3.0.0.tgz#ae16f1644d873ecad843b0307b143362d4c42172"
   integrity sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A==
 
+shell-escape@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/shell-escape/-/shell-escape-0.2.0.tgz#68fd025eb0490b4f567a027f0bf22480b5f84133"
+  integrity sha1-aP0CXrBJC09WegJ/C/IkgLX4QTM=
+
 shellwords@^0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/shellwords/-/shellwords-0.1.1.tgz#d6b9181c1a48d397324c84871efbcfc73fc0654b"
@@ -3708,6 +3701,11 @@ split-string@^3.0.1, split-string@^3.0.2:
   dependencies:
     extend-shallow "^3.0.0"
 
+sprintf-js@^1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/sprintf-js/-/sprintf-js-1.1.2.tgz#da1765262bf8c0f571749f2ad6c26300207ae673"
+  integrity sha512-VE0SOVEHCk7Qc8ulkWw3ntAzXuqf7S2lvwQaDLRnUeIEaKNQJzV6BwmLKhOqT61aGhfUMrXeaBk+oDGCzvhcug==
+
 sprintf-js@~1.0.2:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/sprintf-js/-/sprintf-js-1.0.3.tgz#04e6926f662895354f3dd015203633b857297e2c"