diff --git a/CLAUDE.md b/CLAUDE.md
index 9ddb5b3..d039e23 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -28,7 +28,7 @@ Use `docs/README.md` as the entrypoint for CC:Tweaked, Advanced Peripherals, and
 
 - `startup/servers.lua` starts `/programs`, the shell, and configured servers via `parallel.waitForAll`.
 - Preserve `periphemu` guards used for CraftOS-PC emulation.
-- `install.lua` downloads files listed in `LIST_FILES` from `master`; add shipped files there.
+- `install.lua` downloads files listed in `LIST_FILES` from `master` by default, or from `next` with `--beta`; add shipped files there.
 - Add new servers to `startup/servers.lua` as needed.
 
 ## Conventions
diff --git a/README.md b/README.md
index 6dc6769..b43e977 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,11 @@
 wget run https://raw.githubusercontent.com/guillaumearm/cc-libs/master/install.lua
 ```
 
+Install the beta branch:
+```
+wget run https://raw.githubusercontent.com/guillaumearm/cc-libs/next/install.lua --beta
+```
+
 ## APIs
 - `/apis/eventloop`: a simple event loop API.
 - `/apis/net`: an API to simplify sending and receiving routed messages, based on the `eventloop` library.
@@ -18,7 +23,7 @@ All servers are automatically started at boot.
 - `router`: routes messages. You need to set up a router to use all `apis/net`-based programs and libraries.
 - `ping`: pings machines using `apis/net`.
 - `events`: emits and logs computer events.
-- `upgrade`: upgrades the machine.
+- `upgrade`: upgrades the machine. Use `upgrade --beta` to install from the beta branch.
 
 ## Development
 See [DEVELOPMENT.md](./DEVELOPMENT.md) for development setup and workflow.
diff --git a/install.lua b/install.lua
index 4716c18..355e32d 100644
--- a/install.lua
+++ b/install.lua
@@ -1,4 +1,4 @@
-local _VERSION = '2.2.0'
+local _VERSION = '2.3.0'
 
 local LIST_FILES = {
   -- startup
@@ -19,11 +19,15 @@ local function printUsage()
   print('install usage:');
   print();
   print('\t\t\twget run <install-url>');
+  print('\t\t\twget run <install-url> --beta');
 end
 
 local command = ...;
+local branch = 'master';
 
-if command ~= nil and command ~= '' then
+if command == '--beta' or command == '-beta' then
+  branch = 'next';
+elseif command ~= nil and command ~= '' then
   printUsage();
   return;
 end
@@ -39,7 +43,7 @@ fs.delete('programs/goo.lua');
 fs.delete('servers/cube-server.lua');
 fs.delete('servers/cube-boot.lua');
 
-local REPO_PREFIX = 'https://raw.githubusercontent.com/guillaumearm/cc-libs/master/'
+local REPO_PREFIX = 'https://raw.githubusercontent.com/guillaumearm/cc-libs/' .. branch .. '/'
 
 local previousDir = shell.dir()
 
diff --git a/programs/upgrade.lua b/programs/upgrade.lua
index be66bb4..2433a60 100644
--- a/programs/upgrade.lua
+++ b/programs/upgrade.lua
@@ -1,6 +1,7 @@
-local _VERSION = '1.2.0';
+local _VERSION = '1.3.0';
 
 local INSTALL_URL = 'https://raw.githubusercontent.com/guillaumearm/cc-libs/master/install.lua';
+local BETA_INSTALL_URL = 'https://raw.githubusercontent.com/guillaumearm/cc-libs/next/install.lua';
 
 local command = ...;
 
@@ -8,6 +9,7 @@ local function printUsage()
   print('upgrade usage:');
   print();
   print('\t\t\tupgrade');
+  print('\t\t\tupgrade --beta');
   print('\t\t\tupgrade version');
   print('\t\t\tupgrade help');
 end
@@ -22,6 +24,11 @@ if command == 'help' or command == '-help' or command == '--help' then
   return;
 end
 
+if command == '--beta' or command == '-beta' then
+  shell.execute('wget', 'run', BETA_INSTALL_URL, '--beta');
+  return;
+end
+
 if command ~= nil and command ~= '' then
   printUsage();
   return;