diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 10b0d51..9f943b3 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -14,11 +14,14 @@ jobs:
         include:
           - elixir-version: "1.12.3"
             otp-version: "22.3.4.26"
+            runs-on: "ubuntu-20.04"
           - elixir-version: "1.15.6"
             otp-version: "26.1"
-            lint: lint
+            runs-on: "ubuntu-latest"
+            lint: "lint"
     uses: wojtekmach/setup-elixir/.github/workflows/ci.yml@main
     with:
       elixir-version: ${{ matrix.elixir-version }}
       otp-version: ${{ matrix.otp-version }}
+      runs-on: ${{ matrix.runs-on }}
       lint: ${{ matrix.lint }}