diff --git a/.github/workflows/ci-isos.yaml b/.github/workflows/ci-isos.yaml
index a39c25e..d5f4d76 100644
--- a/.github/workflows/ci-isos.yaml
+++ b/.github/workflows/ci-isos.yaml
@@ -12,6 +12,7 @@ jobs:
     #   group: ${{ github.workflow }}
     #   cancel-in-progress: false
     strategy:
+      max-parallel: 2
       fail-fast: false
       matrix:
         build:
diff --git a/.github/workflows/ci-ostree.yml b/.github/workflows/ci-ostree.yml
index 4319af9..611a221 100644
--- a/.github/workflows/ci-ostree.yml
+++ b/.github/workflows/ci-ostree.yml
@@ -12,6 +12,7 @@ on:
 jobs:
   ci:
     strategy:
+      max-parallel: 2
       fail-fast: false
       matrix:
         variant: