diff --git a/README.md b/README.md
index 1450747765..415f10f23c 100644
--- a/README.md
+++ b/README.md
@@ -38,9 +38,12 @@ build tools</h3>
 ## What do you need to get started?
     
 - x64 machine with at least 2GB of memory and ~35GB of disk space for a VM, container or native OS,
-- Ubuntu Focal 20.04 x64 for native building or any [Docker](https://docs.armbian.com/Developer-Guide_Building-with-Docker/) capable x64 Linux for containerised,
+- Ubuntu Hirsute 21.04 x64 for native building or any [Docker](https://docs.armbian.com/Developer-Guide_Building-with-Docker/) capable x64 Linux for containerised,
+  - Hirsuite is required for newer non-LTS releases.. ex: Bullseye, Sid, Groovy, Hirsuite
+  - If building for LTS releases.. ex: focal, bionic, buster, It is possible to use Ubuntu 20.04 Focal, but is not supported.
 - superuser rights (configured sudo or root access).
 
+
 <p align=right><a href=#table-of-contents>⇧</a></p>
 
 ## How to build an image or a kernel?
diff --git a/config/distributions/hirsute/support b/config/distributions/hirsute/support
index 03cd470150..a23e5fb945 100644
--- a/config/distributions/hirsute/support
+++ b/config/distributions/hirsute/support
@@ -1 +1 @@
-csc
+supported
diff --git a/config/templates/Dockerfile b/config/templates/Dockerfile
index 31d9f396d5..4b0d1fe1fa 100644
--- a/config/templates/Dockerfile
+++ b/config/templates/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:20.04
+FROM ubuntu:21.04
 ARG DEBIAN_FRONTEND=noninteractive
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \