diff --git a/Casks/harness-sync.rb b/Casks/harness-sync.rb
index eaa5fd0..38df117 100644
--- a/Casks/harness-sync.rb
+++ b/Casks/harness-sync.rb
@@ -1,24 +1,24 @@
 # This file was generated by GoReleaser. DO NOT EDIT.
 cask "harness-sync" do
-  version "0.31.19"
+  version "0.31.21"
 
   on_macos do
     on_arm do
-      sha256 "2737c98d9a4ac2f69d6a241a89275e7b4296aa03145156cec3b2f13db645e933"
+      sha256 "9f9c78f187dbe637b4fcf8b087f29ce76c9525af360334ea45a1786969fdacb6"
       url "https://github.com/lukaszraczylo/harness-sync/releases/download/v#{version}/harness-sync-darwin-arm64.tar.gz"
     end
     on_intel do
-      sha256 "d4d810fddba1dfb58c7455beb26b824f45edd7e6273a916b22da118cf24d48bb"
+      sha256 "83f654e33d93740ed8c265ba38cc068f3196c0154843dbc2a92b440504a67dec"
       url "https://github.com/lukaszraczylo/harness-sync/releases/download/v#{version}/harness-sync-darwin-amd64.tar.gz"
     end
   end
   on_linux do
     on_arm do
-      sha256 "53bcfc1130ded4a9934419b4d9f4241f344594475a98cfa1a2d51dd1b6dbf457"
+      sha256 "e5f8a68cb0051189444456564ebecaa6c4db2d0772926c1be556c5a2afc53194"
       url "https://github.com/lukaszraczylo/harness-sync/releases/download/v#{version}/harness-sync-linux-arm64.tar.gz"
     end
     on_intel do
-      sha256 "3194a7994120cc0d849f04e063f42c3250300b29480a16ef3124145fb5982b69"
+      sha256 "2fd6e66498e5f2b113795685bef6dece1cfb7b1589ea9b2429e6c2201caffa86"
       url "https://github.com/lukaszraczylo/harness-sync/releases/download/v#{version}/harness-sync-linux-amd64.tar.gz"
     end
   end
@@ -33,9 +33,10 @@ cask "harness-sync" do
 
   binary "harness-sync"
 
-  postflight_steps do
-    on_macos do
-      run "/usr/bin/xattr", args: ["-dr", "com.apple.quarantine", "{{staged_path}}/harness-sync"]
+  postflight do
+    if OS.mac?
+      system_command "/usr/bin/xattr",
+                     args: ["-dr", "com.apple.quarantine", "#{staged_path}/harness-sync"]
     end
   end