diff --git a/matrix/deployment.yaml b/matrix/deployment.yaml
index 6fdcf2c..11ba636 100644
--- a/matrix/deployment.yaml
+++ b/matrix/deployment.yaml
@@ -17,7 +17,7 @@ spec:
     spec:
       containers:
       - name: synapse
-        image: docker.io/matrixdotorg/synapse:latest
+        image: docker.io/matrixdotorg/synapse:sha-53e8a3c
         env:
           - name: SYNAPSE_CONFIG_DIR
             value: /config