diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 62f0ee2..31fc207 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        otp: ['21','23']
+        otp: ['22','23']
         elixir: ['1.10', '1.11']
         global-mock: [true, false]
         include:
@@ -23,12 +23,12 @@ jobs:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       GLOBAL_MOCK: ${{ matrix.global-mock }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: erlef/setup-beam@v1
         with:
          otp-version: ${{ matrix.otp }}
          elixir-version: ${{ matrix.elixir }}
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: |
             deps