diff --git a/Dockerfile b/Dockerfile
index 074a5ff..eee76c2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:20.04
+FROM ubuntu:22.04
 
 ARG docker_version="20.10.17"
 
diff --git a/ufw-docker b/ufw-docker
index dffc501..6ea6b7c 100755
--- a/ufw-docker
+++ b/ufw-docker
@@ -11,7 +11,7 @@ GREP_REGEXP_INSTANCE_NAME="[-_.[:alnum:]]\\+"
 DEFAULT_PROTO=tcp
 
 ufw_docker_agent=ufw-docker-agent
-ufw_docker_agent_image="${UFW_DOCKER_AGENT_IMAGE:-chaifeng/${ufw_docker_agent}:221002-legacy}"
+ufw_docker_agent_image="${UFW_DOCKER_AGENT_IMAGE:-chaifeng/${ufw_docker_agent}:221002-nf_tables}"
 
 if [[ "${ufw_docker_agent_image}" = *-@(legacy|nf_tables) ]]; then
     if iptables --version | grep -F '(legacy)' &>/dev/null; then