diff --git a/update.sh b/update.sh
index e69de29..c32ebd3 100644
--- a/update.sh
+++ b/update.sh
@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+TYPE=$1
+
+echo "Update method: $TYPE"
+
+case "$TYPE" in
+
+apt)
+
+apt update
+apt upgrade -y
+
+;;
+
+apk)
+
+apk update
+apk upgrade
+
+;;
+
+docker)
+
+docker ps --format "{{.Image}}" | sort -u | while read img
+do
+    docker pull "$img"
+done
+
+;;
+
+*)
+
+echo "Unknown update method"
+
+;;
+
+esac
\ No newline at end of file