diff --git a/lam/docs/README.upgrade.txt b/lam/docs/README.upgrade.txt
index e87e904a..f7ba0bc8 100644
--- a/lam/docs/README.upgrade.txt
+++ b/lam/docs/README.upgrade.txt
@@ -1,6 +1,21 @@
 Upgrade instructions:
 =====================
 
+0.5.x -> 1.0.0:
+===============
+
+The architecture of LAM changed again.
+
+Please enter the LAM configuration editor and edit your existing profiles.
+You can now select which account lists should be displayed by selecting
+the active account types ("Edit account types"). The settings for the LDAP
+suffixes and the list attributes also moved on this page.
+
+After saving all configuration profiles you can login to LAM. The Samba domain
+editor under "Tools" no longer exists. This is now an account type just like
+users or groups. The NIS mail aliases have their own account list, too.
+
+
 
 0.4.x -> 0.5.0:
 ===============