diff --git a/clusters/hybrid01/config/synapse/synapse-deployment.yaml b/clusters/hybrid01/config/synapse/synapse-deployment.yaml
index 80cb7bda..61604abb 100644
--- a/clusters/hybrid01/config/synapse/synapse-deployment.yaml
+++ b/clusters/hybrid01/config/synapse/synapse-deployment.yaml
@@ -135,7 +135,7 @@ spec:
             mountPath: /tmp
       containers:
       - name: mas
-        image: ghcr.io/element-hq/matrix-authentication-service:1.20.0
+        image: ghcr.io/element-hq/matrix-authentication-service:1.21.0
         ports:
         - name: mas
           protocol: TCP