diff --git a/README.md b/README.md
index b26a9a0..e0464af 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 - Support Browser:
   - Chrome : 91.0.4472.124
   - Firefox : 90.0
-  - Safari : 14.1.1
+  - Safari : 14.1.1 on macOS 11.4
 - Test time : 2021/08/12
 
 # WARNING:
@@ -70,7 +70,9 @@ git clone https://github.com/lebr0nli/Slader-Quizlet-extension.git
 
 ## For Safari
 
-I didn't find a good solution to sideload a unsigned extension, if anyone has a better idea, feel free to issue or pull request.
+Need step 3 again if you restart your Safari since this is an unsigned app.
+
+Or you can sign this extension by yourself. See [#19](./issues/19#issuecomment-898248310) for more information.
 
 1. Download `Slader-Quizlet-extension.zip` from github then unzip. (Click the green "Code" button at the top of the page and click "Download ZIP") or use:
 
@@ -82,15 +84,15 @@ git clone https://github.com/lebr0nli/Slader-Quizlet-extension.git
 
 3. Choose **Develop** > **Allow Unsigned Extensions**
 
-4. Double click `Quizlet bypass.xcodeproj` in `Quizlet-bypass(Safari)` and press play button at the top-left to build this extension.
+4. Copy `Quizlet bypass.app` in `Safari/unsigned-app` to your Applications Folder and double click `Quizlet bypass.app` or you can build this extension by yourself with double click `Quizlet bypass.xcodeproj` in `Safari/src` and press play button at the top-left.
 
 5. Choose **Safari** > **Preferences**, click **Extensions** and enable this extension.
 
 6. Choose **Safari** > **Preferences**, click **Websites** and enable this extension to control `quizlet.com`.
 
-7. Done! (need step 3 again if you restart your Safari)
+7. Done!
 
-> p.s. If you want to remove it, go to `~/Library/Developer/Xcode/DerivedData/` and delete the folder start with `Quizlet_bypass` and then restart your Safari.
+> Note: If you want to fully remove unsigned extension which build by yourself, go to `~/Library/Developer/Xcode/DerivedData/` and delete the folder start with `Quizlet_bypass` and then restart your Safari.
 
 # How it works?