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@@ -18,7 +18,7 @@ Therefore I ask you (as a User or Collaborator) to take the role of first level
 
 <h3>Reporting compilation issues</h3>
 
-[Compilation instructions](https://github.com/f4exb/sdrangel/wiki/Compile-from-source-in-Linux) are given in a  particular reference context: Ubuntu 20.10 with prerequisites installed. See in the compilation instructions why 20.10 is preferred over 20.04 LTS. It is very unlikely that problems occurring in this context will reach the master branch. However as this is source code I (as the Maintainer) cannot prevent you (as the User or Collaborator) from trying to compile it in a different context. However in this case you must show evidence that something is wrong in the code. Throwing out the compiler output is clearly not sufficient.
+[Compilation instructions](https://github.com/f4exb/sdrangel/wiki/Compile-from-source-in-Linux) are given in a  particular reference context: Ubuntu 21.04 with prerequisites installed. See in the compilation instructions why 21.04 is preferred over 20.04 LTS. It is very unlikely that problems occurring in this context will reach the master branch. However as this is source code I (as the Maintainer) cannot prevent you (as the User or Collaborator) from trying to compile it in a different context. However in this case you must show evidence that something is wrong in the code. Throwing out the compiler output is clearly not sufficient.
 
 <h3>Reporting run time issues</h3>
 
@@ -26,8 +26,9 @@ An SDR application is complex having close interaction with hardware devices mos
 
 <h3>Reference environments</h3>
 
-This corresponds to the environments for which the artifacts are built. There are just two of them:
-  - Linux Ubuntu 20.10
+This corresponds to the refernce development environment and environments for which the artifacts are built:
+  - Linux Ubuntu 21.04
+  - Linux Ubuntu 20.04 
   - Windows 10
 
 <h2>Snap and Flatpak</h2>