diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index f970794d..843167f4 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -8,11 +8,10 @@ env:
 
 jobs:
   build:
-    # The CMake configure and build commands are platform agnostic and should work equally
-    # well on Windows or Mac.  You can convert this to a matrix build if you need
-    # cross-platform coverage.
-    # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
-    runs-on: [ubuntu-18.04, macos-10.15, windows-2019]
+    runs-on: ${{matrix.os}}
+    strategy:
+      matrix:
+        os: [ubuntu-18.04, macos-10.15, windows-2019]
 
     steps:
     - uses: actions/checkout@v2