diff --git a/k8s/applications/temporal/temporal-values.yaml b/k8s/applications/temporal/temporal-values.yaml
index c62fa49..952eed3 100644
--- a/k8s/applications/temporal/temporal-values.yaml
+++ b/k8s/applications/temporal/temporal-values.yaml
@@ -60,6 +60,16 @@ schema:
 # ── Temporal server config (PostgreSQL persistence) ──────────────────────────
 server:
   replicaCount: 1
+  # temporalio/server:1.30.0+ dropped the `dockerize` binary and switched to
+  # built-in sprig config templating. The chart still defaults to the legacy
+  # configMapsToMount: "dockerize" + setConfigFilePath: false, which produces a
+  # config the 1.30 server never loads — it then falls back to its embedded
+  # env-only template (Cassandra default) and dies with
+  # "Persistence.DataStores[default](value).Cassandra.Hosts: zero value".
+  # Switch to the sprig ConfigMap and point the server at it (chart's own
+  # recommendation for 1.30.0+ images; sprig mode requires setConfigFilePath).
+  configMapsToMount: "sprig"
+  setConfigFilePath: true
   jobService:
     enabled: false
   affinity: