diff --git a/Building-19.1-Release.md b/Building-Release.md
similarity index 90%
rename from Building-19.1-Release.md
rename to Building-Release.md
index e42172d..50b79f2 100644
--- a/Building-19.1-Release.md
+++ b/Building-Release.md
@@ -1,6 +1,9 @@
-## Instructions how to build a new 19.1 maintenance release
+## Instructions how to build a new 20.1 or 19.1 maintenance release
+
+> Our [packaging script](https://github.com/EGroupware/egroupware/blob/master/doc/rpm-build/checkout-build-archives.php) currently requires **composer in version 1.8.6**, otherwise you get an error about bower-asset/cropper! (```composer self-update 1.8.6``` get's you back, in case you updated to 1.9 or later)
+ 
+You need a clean 19.1 checkout without any uncommited or unpushed changes!
 
-You need a clean 19.1 checkout without any uncommited or unpushed changes! 
 ```
 git clone git@github.com:EGroupware/egroupware.git epl-19.1-checkout
 cd epl-19.1-checkout