diff --git a/Casks/z/zulu.rb b/Casks/z/zulu.rb
index fb07261849..02590df682 100644
--- a/Casks/z/zulu.rb
+++ b/Casks/z/zulu.rb
@@ -2,9 +2,9 @@ cask "zulu" do
   arch arm: "aarch64", intel: "x64"
   choice = on_arch_conditional arm: "arm", intel: "x86"
 
-  version "20.0.2,20.32.11_1-ca"
-  sha256 arm:   "c5c196a0a25eca25a22edee325ff8ee2cd96aa9bfdee0ca3554dfbfd31dba8df",
-         intel: "6f02981801832230edd0a0091b8de10873d3271cd7cc4d7a9ed439b046fa4b1f"
+  version "21.0.0,21.28.85-ca"
+  sha256 arm:   "d9ce2ff2be7decf614bf77b4fc5cf119186effc82fff213e14a45bbc33793af4",
+         intel: "d8fc881a204400633189491f411886ee9338d6081767c1efba09b700df92fa0b"
 
   url "https://cdn.azul.com/zulu/bin/zulu#{version.csv.second}-jdk#{version.csv.first}-macosx_#{arch}.dmg",
       referer: "https://www.azul.com/downloads/zulu/zulu-mac/"
@@ -22,7 +22,7 @@ cask "zulu" do
     end
   end
 
-  depends_on macos: ">= :mojave"
+  depends_on macos: ">= :big_sur"
 
   pkg "Double-Click to Install Azul Zulu JDK #{version.major}.pkg"