diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 5a96f43..8466f5a 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -22,6 +22,9 @@ jobs:
           - os: ubuntu-18.04
             ghc: 8.6.5
             cabal: 3.2.0.0
+          - os: ubuntu-18.04
+            ghc: 8.4.4
+            cabal: 3.2.0.0
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2