diff --git a/prod-upgrade/mongo/mongo.yaml b/prod-upgrade/mongo/mongo.yaml
index 2bb0161..19e9fb3 100644
--- a/prod-upgrade/mongo/mongo.yaml
+++ b/prod-upgrade/mongo/mongo.yaml
@@ -47,7 +47,6 @@ spec:
             - name: mongo-keyfile
               mountPath: /etc/mongodb/keyfile.key
               subPath: keyfile.key
-              readOnly: true
       volumes:
       - name: mongo-data
         hostPath: