diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index be097f0..d930f17 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,8 +11,8 @@ jobs:
       USE_BAZEL_VERSION: ${{ matrix.bazel_version }}
     strategy:
       matrix:
-        os: [ubuntu-18.04, macos-10.15]
-        bazel_version: [bazelbuild/3.2.0, bazelbuild/3.3.0]
+        os: [ubuntu-20.04]
+        bazel_version: [bazelbuild/4.2.4]
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1