diff --git a/MAINTENANCE.md b/MAINTENANCE.md
index 77a4a5d..d499d16 100644
--- a/MAINTENANCE.md
+++ b/MAINTENANCE.md
@@ -91,6 +91,12 @@ Temporary exception:
   Once that trust is established for a given database, we continue with the 
   default guidelines above.
 
+WARNING:
+When moving to a new major version of a dependency, the maintainer needs to make
+sure that the version is supported!
+Example: in June 2026, MariaDB got updated to version 12, but nextcloud suggests
+only up to version 11.8 for best performance.
+
 ## Pull Requests
 
 A pull request can be merged once it is approved by at least one maintainer.