diff --git a/.yarn/install-state.gz b/.yarn/install-state.gz
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diff --git a/README.md b/README.md
index 917f8be..6fb6da9 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 This extension hides trending information from twitter timelines to make your mind calm.  
 この拡張機能はTwitterのタイムラインからトレンド情報を隠して、あなたの心を穏やかにしてくれます。
 
-![](design/Share_SNS_en.png)
+![](images/about.png)
 
 1. Hide "Explore" tab from the left column
 2. Hide trends and who to follow from the right column
diff --git a/design/Screenshot_01_en.png b/design/Screenshot_01_en.png
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diff --git a/design/calm-twitter_design.sketch b/design/calm-twitter_design.sketch
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diff --git a/design/promotion_l.jpg b/design/promotion_l.jpg
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diff --git a/design/Share_SNS_en.png b/images/about.png
similarity index 100%
rename from design/Share_SNS_en.png
rename to images/about.png
diff --git a/package.json b/package.json
index 4217264..07c45d8 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,6 @@
   "name": "calm-twitter",
   "private": true,
   "version": "1.5.1",
-  "packageManager": "yarn@4.0.0-rc.43",
   "description": "This extension hides trending information from twitter timelines to make your mind calm.",
   "scripts": {
     "start": "npm run dev:chrome",
@@ -62,4 +61,4 @@
     "webpack-stream": "7.x.x",
     "yargs": "17.x.x"
   }
-}
\ No newline at end of file
+}
diff --git a/yarn.lock b/yarn.lock
deleted file mode 100644
index 3093449..0000000
--- a/yarn.lock
+++ /dev/null
@@ -1,11 +0,0 @@
-# This file is generated by running "yarn install" inside your project.
-# Manual changes might be lost - proceed with caution!
-
-__metadata:
-  version: 7
-
-"calm-twitter@workspace:.":
-  version: 0.0.0-use.local
-  resolution: "calm-twitter@workspace:."
-  languageName: unknown
-  linkType: soft