diff --git a/master_deploy.sh b/master_deploy.sh
index 0a94902..61dd847 100755
--- a/master_deploy.sh
+++ b/master_deploy.sh
@@ -307,6 +307,17 @@ ECS_template_create_register() {
     template=$(echo $template | jq --arg image $AWS_ACCOUNT_ID.dkr.ecr.$AWS_REGION.amazonaws.com/$AWS_REPOSITORY:$ECS_TAG '.containerDefinitions[0].image=$image')
     log "ECR Image name updated"
 
+    #Container readonlyRootFilesystem
+    if [ -z $AWS_ECS_READONLY_ROOTFILESYSTEM ];
+    then
+        log "No ECS readonlyRootFilesystem defined. Going with default value as true"
+        AWS_ECS_READONLY_ROOTFILESYSTEM=true
+        template=$(echo $template | jq --argjson readonlyRootFilesystem $AWS_ECS_READONLY_ROOTFILESYSTEM '.containerDefinitions[0].readonlyRootFilesystem=$readonlyRootFilesystem')
+    else 
+        template=$(echo $template | jq --argjson readonlyRootFilesystem $AWS_ECS_READONLY_ROOTFILESYSTEM '.containerDefinitions[0].readonlyRootFilesystem=$readonlyRootFilesystem')
+    fi
+    log "ECS readonlyRootFilesystem updated."
+
     #Container Memory reservation
     if [ -z $AWS_ECS_CONTAINER_MEMORY_RESERVATION ];
     then