diff --git a/charts/.utils/gitlab-ci.yaml b/charts/.utils/gitlab-ci.yaml
index f40ea66ec4813e42c41c3a7d393c8a57d8815e37..cfebe585ba892978297dac587680d063463d07fd 100644
--- a/charts/.utils/gitlab-ci.yaml
+++ b/charts/.utils/gitlab-ci.yaml
@@ -15,7 +15,7 @@
 chart-package:
   stage: build
   extends: .chart-matrix
-  image: quay.io/shivering-isles/koolbox:2025.04
+  image: quay.io/shivering-isles/koolbox:2025.06
   script:
     - export TMP_DIR=$(mktemp -d)
     - helm package charts/${CHART} -d "$TMP_DIR"
@@ -29,7 +29,7 @@ chart-package:
 chart-helm-lint:
   stage: lint
   extends: .chart-matrix
-  image: quay.io/shivering-isles/koolbox:2025.04
+  image: quay.io/shivering-isles/koolbox:2025.06
   script:
     - helm lint --strict charts/${CHART}
   rules: