diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..d207b18
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+*.go text eol=lf
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1e8c899..4d4a3a6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -31,7 +31,7 @@ jobs:
     strategy:
       matrix:
         go-version: [1.16.x]
-        os: [ubuntu-18.04]
+        os: [ubuntu-18.04, macos-10.15, windows-2019]
 
     steps:
       - uses: actions/checkout@v2