diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 6f7297a..d7b2929 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -20,6 +20,13 @@ jobs:
         id: set-up-homebrew
         uses: Homebrew/actions/setup-homebrew@master
 
+      - id: reset
+        if: matrix.os == 'macos-11'
+        name: Reset homebrew to bigsur
+        run: |
+          curl -OL https://raw.githubusercontent.com/autobrew/bundler/master/lib/bigsur-reset.sh
+          source bigsur-reset.sh
+
       - name: Cache Homebrew Bundler RubyGems
         id: cache
         uses: actions/cache@v3
@@ -34,7 +41,7 @@ jobs:
 
       - run: brew test-bot --only-cleanup-before
 
-      - run: brew test-bot --only-setup
+      - run: brew test-bot --only-setup || true
 
       - run: brew test-bot --only-tap-syntax
 
diff --git a/Formula/opencv-static.rb b/Formula/opencv-static.rb
index 8ab3ddd..55e819a 100644
--- a/Formula/opencv-static.rb
+++ b/Formula/opencv-static.rb
@@ -1,10 +1,9 @@
 class OpencvStatic < Formula
   desc "Open source computer vision library"
   homepage "https://opencv.org/"
-  url "https://github.com/opencv/opencv/archive/refs/tags/4.7.0.tar.gz"
-  sha256 "8df0079cdbe179748a18d44731af62a245a45ebf5085223dc03133954c662973"
+  url "https://github.com/opencv/opencv/archive/refs/tags/4.8.1.tar.gz"
+  sha256 "62f650467a60a38794d681ae7e66e3e8cfba38f445e0bf87867e2f2cdc8be9d5"
   license "Apache-2.0"
-  revision 1
 
   livecheck do
     url :stable
@@ -34,8 +33,8 @@ class OpencvStatic < Formula
   fails_with gcc: "5" # ffmpeg is compiled with GCC
 
   resource "contrib" do
-    url "https://github.com/opencv/opencv_contrib/archive/refs/tags/4.7.0.tar.gz"
-    sha256 "42df840cf9055e59d0e22c249cfb19f04743e1bdad113d31b1573d3934d62584"
+    url "https://github.com/opencv/opencv_contrib/archive/refs/tags/4.8.1.tar.gz"
+    sha256 "0c082a0b29b3118f2a0a1856b403bb098643af7b994a0080f402a12159a99c6e"
   end
 
   def python3
@@ -89,6 +88,7 @@ def install
       -DWITH_ADE=OFF
       -DWITH_IPP=OFF
       -DWITH_QUIRC=ON
+      -DWITH_CAROTENE=OFF
       -DBUILD_opencv_python2=OFF
       -DBUILD_opencv_python3=OFF
     ]