diff --git a/.github/workflows/sandbox.yml b/.github/workflows/sandbox.yml
index ff0b373..14fee19 100644
--- a/.github/workflows/sandbox.yml
+++ b/.github/workflows/sandbox.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        platform: ["amd64", "arm64v8", "ppc64le", "s390x"]
+        platform: ["amd64", "arm64/v8", "ppc64le", "s390x"]
     steps:
     - name: Set up QEMU
       uses: docker/setup-qemu-action@v2
@@ -32,7 +32,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        platform: ["386", "arm32v6", "arm32v7"]
+        platform: ["386", "arm32/v6", "arm32/v7"]
     steps:
     - name: Set up QEMU
       uses: docker/setup-qemu-action@v2