diff --git a/core-deployments.yaml b/core-deployments.yaml
index 77b8e5c..771e7f3 100644
--- a/core-deployments.yaml
+++ b/core-deployments.yaml
@@ -98,7 +98,7 @@ spec:
   sources:
     - chart: kube-prometheus-stack
       repoURL: https://prometheus-community.github.io/helm-charts
-      targetRevision: 55.5.0
+      targetRevision: 54.2.2
       helm:
         releaseName: prometheus
         valueFiles:
@@ -215,7 +215,7 @@ spec:
   sources:
     - chart: loki
       repoURL: https://grafana.github.io/helm-charts
-      targetRevision: 5.41.4
+      targetRevision: 5.38.0
       helm:
         releaseName: loki
         valueFiles: