diff --git a/README.md b/README.md
index 0b4d658a..1f2316e4 100644
--- a/README.md
+++ b/README.md
@@ -14,20 +14,20 @@ This library provides some interfaces, classes, [Roslyn Source Generators](https
 See [wiki](https://github.com/PawelGerr/Thinktecture.Runtime.Extensions/wiki) for more documentation.
 
 # Required SDK/Compiler Version
-* Compiler version: 4.1.0
+* Compiler version: 4.2.0
 
 Verify the version by placing `#error version` into any of your cs-files and build the project/solution.  
 The build output should display the compiler version: 
 ```
 MyFile.cs(15, 8): [CS1029] #error: 'version'
-MyFile.cs(15, 8): [CS8304] Compiler version: '4.1.0-5.22165.10 (e555772d)'. Language version: 10.0.
+MyFile.cs(15, 8): [CS8304] Compiler version: '4.2.0-4.22220.2 (1e40aa11)'. Language version: 10.0.
 ```
 
 Update your IDE and SDK to newest version.  
 Works/tested with:
-* SDK: 6.0.202
-* Visual Studio: 17.1.5
-* JetBrains Rider: 2022.1 
+* SDK: 6.0.300
+* Visual Studio: 17.2.0
+* JetBrains Rider: 2022.1.1 
 
 > Please note: For developers having both, JetBrains Rider and Visual Studio, please update Visual Studio as well, because Rider is using the SDK of Visual Studio by default.