diff --git a/doc/installation.md b/doc/installation.md
index c26f5a504..36b83ff04 100644
--- a/doc/installation.md
+++ b/doc/installation.md
@@ -498,3 +498,7 @@ The first release candidate of Icinga Web 2 introduces the following non-backwar
   **<config-dir>/preferences/<username>.ini** to
   **<config-dir>/preferences/<username>/config.ini**.
   The content of the file remains unchanged.
+
+## <a id="upgrading-to-2.1.0"></a> Upgrading to Icinga Web 2 2.1.0
+
+Icinga Web 2 2.1.0 does not introduce any backward incompatible change.