diff --git a/de/heat-templates/env/mstr1-wrkr3-cmp2-gtw0-vsrx1.yaml b/de/heat-templates/env/mstr1-wrkr3-cmp2-gtw0-vsrx1.yaml
index 8871fa3..ff23173 100644
--- a/de/heat-templates/env/mstr1-wrkr3-cmp2-gtw0-vsrx1.yaml
+++ b/de/heat-templates/env/mstr1-wrkr3-cmp2-gtw0-vsrx1.yaml
@@ -11,6 +11,7 @@
 parameters:
   image: bionic-server-cloudimg-amd64-20190612
   public_net_id: public
+  vsrx_image: mos-vsrx-3nets
   masters_size: 0
   worker_size: 3
   cmp_size: 2
diff --git a/de/heat-templates/fragments/NetworkPrvFl.yaml b/de/heat-templates/fragments/NetworkPrvFl.yaml
index f122682..5519508 100644
--- a/de/heat-templates/fragments/NetworkPrvFl.yaml
+++ b/de/heat-templates/fragments/NetworkPrvFl.yaml
@@ -20,6 +20,12 @@
     type: string
   tun_network:
     type: string
+  vsrx_image:
+    type: string
+    default: vsrx-mcp2-tf-3-nets
+  vsrx_flavor:
+    type: string
+    default: oc_vsrx
 
 resources:
 
diff --git a/de/heat-templates/fragments/NetworkPrvFlVSRX.yaml b/de/heat-templates/fragments/NetworkPrvFlVSRX.yaml
index 847a256..7bf6781 100644
--- a/de/heat-templates/fragments/NetworkPrvFlVSRX.yaml
+++ b/de/heat-templates/fragments/NetworkPrvFlVSRX.yaml
@@ -17,6 +17,12 @@
     type: string
   tun_network:
     type: string
+  vsrx_image:
+    type: string
+    default: vsrx-mcp2-tf-3-nets
+  vsrx_flavor:
+    type: string
+    default: oc_vsrx
 
 resources:
 
@@ -62,8 +68,8 @@
     properties:
       name: { list_join: ['-', [get_param: "OS::stack_name", 'vsrx01']] }
       availability_zone: nova
-      image: vsrx-mcp2-tf-3-nets
-      flavor: oc_vsrx
+      image: { get_param: vsrx_image }
+      flavor: { get_param: vsrx_flavor }
       networks:
         - port: { get_resource: accessible_server_port }
         - port: { get_resource: private_floating_server_port }
diff --git a/de/heat-templates/top.yaml b/de/heat-templates/top.yaml
index 757f689..7864c06 100644
--- a/de/heat-templates/top.yaml
+++ b/de/heat-templates/top.yaml
@@ -272,6 +272,12 @@
     description: If set true then AIO is going to be deployed.
     type: string
     default: 'false'
+  vsrx_image:
+    type: string
+    default: vsrx-mcp2-tf-3-nets
+  vsrx_flavor:
+    type: string
+    default: oc_vsrx
 
 conditions:
   aio_deploy:
@@ -316,6 +322,8 @@
       accessible_network: { get_attr: [accessible_network, public_network]}
       data_network_vsrx_ip: { get_param: data_network_vsrx_ip }
       tun_network: { get_attr: [tun_network, tun_network_id] }
+      vsrx_image: { get_param: vsrx_image }
+      vsrx_flavor: { get_param: vsrx_flavor }
 
   storage_network:
     type: MCP2::NetworkAccStorage