diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index cdcb3b3..84ce844 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -7,18 +7,9 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
-    name: OTP ${{matrix.otp}} / Elixir ${{matrix.elixir}}
-    strategy:
-      matrix:
-        otp: ['21.x', '22.x']
-        elixir: ['1.8.2', '1.9.4']
+    runs-on: elixir:1.8.2-otp-22
     steps:
       - uses: actions/checkout@v4
-      - uses: erlef/setup-beam@v1
-        with:
-          otp-version: ${{matrix.otp}}
-          elixir-version: ${{matrix.elixir}}
 
       - name: Install dependencies
         run: mix deps.get