diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9977fff..2fa1bfa 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -6,12 +6,18 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest]
+        nim-version: ['1.4.x', 'stable']
+        include:
+          - nim-version: '1.4.x'
+          - nim-version: 'stable'
 
     runs-on: ${{ matrix.os }}
 
     steps:
     - uses: actions/checkout@v2
     - uses: jiro4989/setup-nim-action@v1
+      with:
+        nim-version: ${{ matrix.nim-version }}
     - run: nimble test -d:release -y
     - run: nimble test -d:release -d:pixieNoSimd -y
     - run: nimble test --gc:orc -d:release -y