diff --git a/Casks/zen-browser.rb b/Casks/zen-browser.rb
index 0fcabbc57..179b6a4a5 100644
--- a/Casks/zen-browser.rb
+++ b/Casks/zen-browser.rb
@@ -16,10 +16,6 @@ cask "zen-browser" do
 
   app "Zen Browser.app"
 
-  postflight do
-    system "xattr -d com.apple.quarantine '/Applications/Zen Browser.app/'"
-  end
-
   zap trash: [
         "~/Library/Application Support/zen",
         "~/Library/Caches/Mozilla/updates/Applications/Zen Browser",
diff --git a/README.md b/README.md
index ed7e55d42..f41643085 100644
--- a/README.md
+++ b/README.md
@@ -44,14 +44,14 @@ You can install the Zen Browser using Homebrew:
 
 ```
 brew tap zen-browser/browser https://github.com/zen-browser/desktop.git
-brew install --cask zen-browser
+brew install --no-quarantine --cask zen-browser
 ```
 
 To upgrade the browser to a newer version, you can either use the embedded update functionality in `About Zen` or use the following commands:
 
 ```
 brew update
-brew upgrade --greedy zen-browser
+brew upgrade --no-quarantine --greedy zen-browser
 ```
 
 ### Manual installation