diff --git a/.github/workflows/push-main.yml b/.github/workflows/push-main.yml
index b0014d8d2..3922c0ad9 100644
--- a/.github/workflows/push-main.yml
+++ b/.github/workflows/push-main.yml
@@ -7,8 +7,8 @@ jobs:
   gradle-build:
     strategy:
       matrix:
+        os: [ ubuntu-latest ]
         jdk: [ 21 ]
-        
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2
@@ -33,8 +33,8 @@ jobs:
   gradle-publish:
     strategy:
       matrix:
+        os: [ ubuntu-latest ]
         jdk: [ 21 ]
-        
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2