diff --git a/.github/workflows/acceptance.yml b/.github/workflows/acceptance.yml
index 255137a..bafcd0d 100644
--- a/.github/workflows/acceptance.yml
+++ b/.github/workflows/acceptance.yml
@@ -30,8 +30,7 @@ permissions:
 
 env:
   CLOUDSTACK_API_URL: http://localhost:8080/client/api
-  #CLOUDSTACK_VERSIONS: "['4.18.2.5', '4.19.1.1', '4.19.1.3']"
-  CLOUDSTACK_VERSIONS: "['4.19.1.1']"
+  CLOUDSTACK_VERSIONS: "['4.18.2.5', '4.19.1.3', '4.20.0.0']"
 jobs:
   prepare-matrix:
     runs-on: ubuntu-latest
@@ -54,6 +53,7 @@ jobs:
           - 8080:5050
     strategy:
       fail-fast: false
+      max-parallel: 1
       matrix:
         cloudstack-version: ${{ fromJson(needs.prepare-matrix.outputs.cloudstack-versions) }}
         python-version:
diff --git a/.github/workflows/setup-cloudstack/action.yml b/.github/workflows/setup-cloudstack/action.yml
index 548ee1e..5d2a0b9 100644
--- a/.github/workflows/setup-cloudstack/action.yml
+++ b/.github/workflows/setup-cloudstack/action.yml
@@ -53,10 +53,15 @@ runs:
         done
     - name: Setting up Cloudstack
       id: setup-cloudstack
+      continue-on-error: true
       shell: bash
       run: |
         docker exec $(docker container ls --format=json -l | jq -r .ID) python /root/tools/marvin/marvin/deployDataCenter.py -i /root/setup/dev/advanced.cfg
         curl -sf --location "${CLOUDSTACK_API_URL}" \
+            --max-time 10 \
+            --retry 5 \
+            --retry-delay 1 \
+            --retry-max-time 40 \
             --header 'Content-Type: application/x-www-form-urlencoded' \
             --data-urlencode 'command=login' \
             --data-urlencode 'username=admin' \