diff --git a/README.md b/README.md
index a9a7c62..17099de 100644
--- a/README.md
+++ b/README.md
@@ -37,13 +37,18 @@ public class MyClass : MonoBehaviour {
 
 
 ### Installing with Unity Package Manager
-To install this project as a dependency using the Unity Package Manager,
+To install this project as a dependency using the [Unity Package Manager](https://docs.unity3d.com/Manual/upm-git.html),
 add the following line to your project's `manifest.json`:
 
 ```
 "com.github.siccity.serializablecallback": "git+https://github.com/Siccity/SerializableCallback.git"
 ```
 
+or just add the following line by clicking on `add package from git URL` button in the [Unity Package Manager](https://docs.unity3d.com/Manual/upm-ui-giturl.html) window:
+```
+https://github.com/Siccity/SerializableCallback.git
+```
+
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