diff --git a/README.md b/README.md
index 2467471..990399a 100644
--- a/README.md
+++ b/README.md
@@ -41,13 +41,6 @@ Find the manifest.json file in the Packages folder of your project and edit it t
 Changes between 'DOC START' and 'DOC END' will not be modified by readme update scripts
 -->
 
-## Quick Package Install
-
-### Using UnityPackageManager (for Unity 2019.3 or later)
-Open the package manager window (menu: Window > Package Manager)<br/>
-Select "Add package from git URL...", fill in the pop-up with the following link:<br/>
-[https://github.com/coryleach/UnityAsync.git#1.0.3](https://github.com/coryleach/UnityAsync.git#1.0.3)<br/>
-
 ### Using OpenUPM
 
 The package is available on the [openupm registry](https://openupm.com). It's recommended to install it via [openupm-cli](https://github.com/openupm/openupm-cli).
@@ -56,17 +49,6 @@ The package is available on the [openupm registry](https://openupm.com). It's re
 openupm add com.gameframe.async
 ```
 
-### Using UnityPackageManager (for Unity 2019.2 or earlier)
-Find the manifest.json file in the Packages folder of your project and edit it to look like this:
-```js
-{
-  "dependencies": {
-    "com.gameframe.async": "https://github.com/coryleach/UnityAsync.git#1.0.3",
-    ...
-  },
-}
-```
-
 ## Quick Start
 
 ### Start and Await a coroutine from anywhere