diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 2ced093..488e403 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -51,7 +51,6 @@ jobs:
           git config user.name github-actions
           git config user.email github-actions@github.com
           nix flake update --accept-flake-config
-          ./packages/zen-browser-unwrapped/update.sh
           git diff
           if [[ -n $(git status -s) ]]; then
             echo "CHANGED=true" >> $GITHUB_OUTPUT
@@ -227,7 +226,6 @@ jobs:
           git config user.name github-actions
           git config user.email github-actions@github.com
           nix flake update --accept-flake-config
-          ./packages/zen-browser-unwrapped/update.sh
           git diff
           if [[ -n $(git status -s) ]]; then
             echo "CHANGED=true" >> $GITHUB_OUTPUT
diff --git a/packages/zen-browser-unwrapped/default.nix b/packages/zen-browser-unwrapped/default.nix
index 07161a8..766e715 100644
--- a/packages/zen-browser-unwrapped/default.nix
+++ b/packages/zen-browser-unwrapped/default.nix
@@ -151,7 +151,7 @@
 in
   buildStdenv.mkDerivation rec {
     pname = "zen-browser-unwrapped";
-    version = "1.0.1-a.10";
+    version = "1.0.1-a.12";
 
     src = fetchFromGitHub {
       owner = "zen-browser";
@@ -159,13 +159,13 @@ in
       rev = "${version}";
       leaveDotGit = true;
       fetchSubmodules = true;
-      hash = "sha256-JnohKvY7455qlPpcr38307DEnAWFdJF+liLBnvBSl98=";
+      hash = "sha256-O5S468G+2fF11mnjR8lMSVBOTRe/X5VxfBLAEVh2mA0=";
     };
 
     firefoxVersion = (lib.importJSON "${src}/surfer.json").version.version;
     firefoxSrc = fetchurl {
       url = "mirror://mozilla/firefox/releases/${firefoxVersion}/source/firefox-${firefoxVersion}.source.tar.xz";
-      hash = "sha256-en3z+Xc3RT76okPKnbr5XQ8PgzxdyK+stXBO4W7wYNA=";
+      hash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
     };
 
     SURFER_COMPAT = generic;
diff --git a/packages/zen-browser-unwrapped/update.sh b/packages/zen-browser-unwrapped/update.sh
old mode 100644
new mode 100755
index e69de29..1a4c004
--- a/packages/zen-browser-unwrapped/update.sh
+++ b/packages/zen-browser-unwrapped/update.sh
@@ -0,0 +1,66 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl jq common-updater-scripts nix-prefetch-git nix-prefetch-github
+
+# Define the package file
+PACKAGE_FILE="default.nix"
+
+# Function to get the latest version of zen-browser/desktop
+get_latest_version() {
+  curl --silent "https://api.github.com/repos/zen-browser/desktop/releases" |
+    jq -r '[.[] | select(.prerelease==false)][0].tag_name'
+}
+
+# Get the latest version
+latest_version=$(get_latest_version)
+
+if [ -z "$latest_version" ] || [ "$latest_version" == "null" ]; then
+  echo "Failed to get the latest version."
+  exit 1
+fi
+
+echo "Latest version: $latest_version"
+
+# Update the 'version' variable in the Nix expression
+sed -i "/pname = \"zen-browser-unwrapped\";/,/version = \".*\";/s/version = \".*\";/version = \"$latest_version\";/" "$PACKAGE_FILE"
+
+# Fetch the new 'src' hash
+echo "Fetching new source hash..."
+src_info=$(nix-prefetch-github zen-browser desktop --rev "$latest_version" --fetch-submodules)
+src_hash=$(echo "$src_info" | jq -r .sha256)
+
+echo "New source hash: $src_hash"
+
+# Update 'rev' and 'hash' in the 'src' fetchFromGitHub
+sed -i "/src = fetchFromGitHub {/,/};/{
+    /owner = \"zen-browser\";/,/};/{
+        s/rev = \".*\";/rev = \"$latest_version\";/
+        s/hash = \".*\";/hash = \"$src_hash\";/
+    }
+}" "$PACKAGE_FILE"
+
+# Clone the repository to extract 'firefoxVersion'
+tmpdir=$(mktemp -d)
+trap 'rm -rf "$tmpdir"' EXIT
+
+git clone --depth 1 --branch "$latest_version" https://github.com/zen-browser/desktop.git "$tmpdir"
+
+# Extract 'firefoxVersion' from 'surfer.json'
+firefoxVersion=$(jq --raw-output '.version.version' "$tmpdir/surfer.json")
+echo "Firefox version: $firefoxVersion"
+
+# Update the 'firefoxVersion' in the Nix expression
+sed -i "s/firefoxVersion = \".*\";/firefoxVersion = \"$firefoxVersion\";/" "$PACKAGE_FILE"
+
+# Fetch the new 'firefoxSrc' hash
+firefox_url="mirror://mozilla/firefox/releases/$firefoxVersion/source/firefox-$firefoxVersion.source.tar.xz"
+echo "Fetching Firefox source hash..."
+firefox_hash=$(nix-prefetch-url --unpack "$firefox_url")
+
+echo "Firefox source hash: $firefox_hash"
+
+# Update the 'firefoxSrc' hash in the Nix expression
+sed -i "/firefoxSrc = fetchurl {/,/};/{
+    s/hash = \".*\";/hash = \"$firefox_hash\";/
+}" "$PACKAGE_FILE"
+
+echo "Update complete!"