diff --git a/sock-shop/queue-master.yaml b/sock-shop/queue-master.yaml
index 87a8385..bf19a7f 100644
--- a/sock-shop/queue-master.yaml
+++ b/sock-shop/queue-master.yaml
@@ -30,6 +30,9 @@ spec:
             memory: 300Mi
         ports:
         - containerPort: 80
+        securityContext:
+          readOnlyRootFilesystem: true
+
 ---
 apiVersion: v1 # Service - queue-master
 kind: Service