diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 9c8b0696..56d9949e 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -20,7 +20,7 @@ jobs:
     steps:
       - id: set-matrix
         run: |
-          echo "::set-output name=matrix::[\"ubuntu-latest\", \"windows-latest\"]"
+          echo 'matrix=["ubuntu-latest", "windows-latest"]' >> $GITHUB_ENV
           
   setup:
     needs: define-matrix