diff --git a/infra-monitoring/templates/alertmanager/matrix/release.yaml b/infra-monitoring/templates/alertmanager/matrix/release.yaml
index e8f88cd..dde10df 100644
--- a/infra-monitoring/templates/alertmanager/matrix/release.yaml
+++ b/infra-monitoring/templates/alertmanager/matrix/release.yaml
@@ -35,6 +35,7 @@ spec:
     bot:
       matrix:
         homeserver: {{ .homeserver | quote }}
+        messageType: {{ .messageType | quote }}
         userID: {{ .userID | quote }}
         rooms:
           - {{ .default | quote }}
diff --git a/infra-monitoring/values.yaml b/infra-monitoring/values.yaml
index d882167..9b6cede 100644
--- a/infra-monitoring/values.yaml
+++ b/infra-monitoring/values.yaml
@@ -98,10 +98,13 @@ alertmanager:
       sendResolved: false
       homeserver: "https://matrix.org"
       userID: "@alert:matrix.org"
+      # -- message type of alerts in matrix
+      messageType: "m.notice"
       # -- token of matrix reciever (use valuesFrom in flux for it)
       token: ""
+      # -- default room (additional rooms are possible)
       default: "!example-room:matrix.org"
-      #
+      # -- additional rooms
       rooms: {}
       # room-name:
       #   - room: "!example-room-name:matrix.org"