diff --git a/Casks/flux-beta.rb b/Casks/flux-beta.rb
new file mode 100644
index 000000000..60dec9e10
--- /dev/null
+++ b/Casks/flux-beta.rb
@@ -0,0 +1,26 @@
+cask 'flux-beta' do
+  version '39.93'
+  sha256 'b182d321956cb540bb7fa6d3357817981c5d45ab103a56ece7fd5582d879b1ce'
+
+  url "https://justgetflux.com/mac/Flux#{version}.zip"
+  appcast 'https://justgetflux.com/mac/macflux.xml',
+          checkpoint: 'f6127c732fe64848139f952b0ff08dcd4ba97f1a58d6599857d6268ad035b5ec'
+  name 'f.lux'
+  homepage 'https://justgetflux.com/'
+
+  auto_updates true
+  conflicts_with cask: 'flux'
+
+  app 'Flux.app'
+
+  postflight do
+    suppress_move_to_applications
+  end
+
+  uninstall login_item: 'Flux'
+
+  zap delete: [
+                '~/Library/Preferences/org.herf.Flux.plist',
+                '~/Library/Caches/org.herf.Flux',
+              ]
+end