diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ab8dea1b5665e6b15545fd0e59e8025c9a62ffa5..58fe4c6da24638990cc7324a85bc12930c79dee2 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -835,6 +835,9 @@ kube-prometheus-stack-alerts:
   variables:
     # RESOURCE var is used in job specific rules (i.e. .kube_prometheus_stack_rules)
     RESOURCE: "kube-prometheus-stack"
+    # Enforce python requests using the system cert store, where LE staging
+    # cacert is added
+    REQUESTS_CA_BUNDLE: "/etc/ssl/certs/ca-certificates.crt"
   allow_failure: true
   script:
     - *debug_information