diff --git a/docs/guides/matrix-create-room.md b/docs/guides/matrix-create-room.md
index 582e94c1..23c9052e 100644
--- a/docs/guides/matrix-create-room.md
+++ b/docs/guides/matrix-create-room.md
@@ -11,7 +11,7 @@ title: "Matrix: Create a New Room"
 ## 1. Create the Room
 
 Rooms are always created by the *CCCHH-Admin* Account whose credentials can be found in *infra-secrets*.
-To create a room, log in to https://element.hamburg.ccc.de and click on *New Conversation* -> *New Room*.
+To create a room, log in to [https://element.hamburg.ccc.de](https://element.hamburg.ccc.de) and click on *New Conversation* -> *New Room*.
 Enter a Room Name and optionally give it an address on the *hamburg.ccc.de* server.
 
 ## 2. Configure Room Metadata
diff --git a/resources/chaosknoten/ccchoir/docker_compose/compose.yaml.j2 b/resources/chaosknoten/ccchoir/docker_compose/compose.yaml.j2
index 72d898fa..2dff4bcd 100644
--- a/resources/chaosknoten/ccchoir/docker_compose/compose.yaml.j2
+++ b/resources/chaosknoten/ccchoir/docker_compose/compose.yaml.j2
@@ -3,7 +3,7 @@
 
 services:
   database:
-    image: docker.io/library/mariadb:11
+    image: docker.io/library/mariadb:12
     environment:
       - "MARIADB_DATABASE=wordpress"
       - "MARIADB_ROOT_PASSWORD={{ secret__mariadb_root_password }}"