diff --git a/charts/guardrails/CHANGELOG.md b/charts/guardrails/CHANGELOG.md
index 2e4a4f5..f2c5df1 100644
--- a/charts/guardrails/CHANGELOG.md
+++ b/charts/guardrails/CHANGELOG.md
@@ -6,24 +6,25 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning]
 (https://semver.org/spec/v2.0.0.html).
 
-## [0.5.0] - 2024-12-02
-
-### Added
+## [0.5.1] - 2024-12-09
 
-- Add caching support, enabled with `cache.enable: true` (default is `true`)
-- HPA support for configuring scaling behavior
+### Fixed
 
-## [0.4.0] - 2024-11-26
+- Reverted guardrails deployment selector labels change to be consistent with
+  previous chart versions. The cache layer deployment selector labels have been
+  updated to be independently unique.
 
 ### Changed
 
-- Default image tag from `2.0.1` to `2.2.2`
+- Conditionally set `WHYLABS_API_CACHE_ENDPOINT` environment variable based on
+  the `cache.enable` value.
+
+## [0.5.0] - 2024-12-02
 
 ### Added
 
-- Caching support enabled with `cache.enable: true`
-- Horizontal Pod Autoscaler (HPA) support for configuring scaling behavior
-- Startup probe to support more graceful startup and scaling behavior
+- Add caching support, enabled with `cache.enable: true` (default is `true`)
+- HPA support for configuring scaling behavior
 
 ## [0.3.1] - 2024-10-31
 
diff --git a/charts/guardrails/Chart.yaml b/charts/guardrails/Chart.yaml
index 1087259..2291c68 100644
--- a/charts/guardrails/Chart.yaml
+++ b/charts/guardrails/Chart.yaml
@@ -2,6 +2,6 @@ apiVersion: v2
 name: guardrails
 description: A Helm chart for WhyLabs Guardrails
 type: application
-version: 0.5.0
+version: 0.5.1
 appVersion: "2.2.2"
 icon: "https://whylabs.ai/_next/static/images/whylabs-favicon-192c009321aebbb96c19921a170fc880.png"
diff --git a/charts/guardrails/README.md b/charts/guardrails/README.md
index e72bd3a..9b40059 100644
--- a/charts/guardrails/README.md
+++ b/charts/guardrails/README.md
@@ -1,6 +1,6 @@
 # guardrails
 
-![Version: 0.5.0](https://img.shields.io/badge/Version-0.5.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.2.2](https://img.shields.io/badge/AppVersion-2.2.2-informational?style=flat-square)
+![Version: 0.5.1](https://img.shields.io/badge/Version-0.5.1-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.2.2](https://img.shields.io/badge/AppVersion-2.2.2-informational?style=flat-square)
 
 A Helm chart for WhyLabs Guardrails
 
@@ -118,14 +118,14 @@ release_name=""
 # the working directory or --destination path
 helm pull \
   oci://ghcr.io/whylabs/guardrails \
-  --version 0.5.0
+  --version 0.5.1
 
 # Requires the helm-diff plugin to be installed:
 # helm plugin install https://github.com/databus23/helm-diff
 helm diff upgrade \
   --allow-unreleased \
   --namespace "${target_namespace}" \
-  "${release_name}" guardrails-0.5.0.tgz
+  "${release_name}" guardrails-0.5.1.tgz
 ```
 
 After you've installed the repo you can install the chart.
@@ -134,7 +134,7 @@ After you've installed the repo you can install the chart.
 helm upgrade --install \
   --create-namespace \
   --namespace "${target_namespace}" \
-  "${release_name}" guardrails-0.5.0.tgz
+  "${release_name}" guardrails-0.5.1.tgz
 ```
 
 ## Exposing Guardrails Outside Kubernetes
@@ -290,7 +290,7 @@ autoscaling:
 | cache.labels | object | `{}` | Labels for the cache. |
 | cache.replicaCount | int | `1` | Number of replicas for the cache. |
 | commonLabels | object | `{}` | Labels to add to all chart resources. |
-| env | object | `{}` | [Environment variables](https://kubernetes.io/docs/tasks/inject-data-application/define-environment-variable-container/) for the `guardrails` container. **Supports Helm templating syntax**, e.g. you can use `{{ .Release.Name }}` or other templating variables, functions, and conditions within the the value of each environment variable. |
+| env | object | `{"CONFIG_SYNC_INTERVAL":"1","TENANCY_MODE":"{{ .Values.tenancyMode | default \"SINGLE\" }}","WHYLABS_API_CACHE_ENDPOINT":"{{ if .Values.cache.enable }}{{ .Release.Name }}.{{ .Release.Namespace }}.svc.cluster.local{{ else }}{{ end }}"}` | [Environment variables](https://kubernetes.io/docs/tasks/inject-data-application/define-environment-variable-container/) for the `guardrails` container. **Supports Helm templating syntax**, e.g. you can use `{{ .Release.Name }}` or other templating variables, functions, and conditions within the the value of each environment variable. |
 | envFrom | list | `[{"secretRef":{"name":"whylabs-guardrails-api-key","optional":true}},{"secretRef":{"name":"whylabs-guardrails-api-secret","optional":true}}]` | Create environment variables from Kubernetes secrets or config maps. |
 | envFrom[0].secretRef.name | string | `"whylabs-guardrails-api-key"` | Name of the Kubernetes secret containing the API key. The secret must be in the same namespace as the release and should be created prior to installing the chart. |
 | envFrom[1].secretRef.name | string | `"whylabs-guardrails-api-secret"` | Name of the Kubernetes secret containing the container password, the value used when executing requests against the guardrails container. The secret must be in the same namespace as the release and should be created prior to installing the chart. |
@@ -322,7 +322,7 @@ autoscaling:
 | serviceAccount.labels | object | `{}` | Labels to add to the service account. |
 | serviceAccount.name | string | `""` | If this is set and `serviceAccount.create` is `true` this will be used for the created `ServiceAccount` name, if set and `serviceAccount.create` is `false` then this will define an existing `ServiceAccount` to use. |
 | startupProbe | object | `{"failureThreshold":20,"httpGet":{"path":"/health","port":8000},"initialDelaySeconds":20,"periodSeconds":10}` | [Readiness probe](https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/) configuration for the `guardrails` container. Liveness and readiness probes are suppressed until the startup probe succeeds. |
-| tenancyMode | string | `"MULTI"` | tenancyMode for the guardrails service. Must be `SINGLE` or `MULTI`. |
+| tenancyMode | string | `"SINGLE"` | tenancyMode for the guardrails service. Must be `SINGLE` or `MULTI`. |
 | tolerations | list | `[]` | Node taints which will be tolerated for `Pod` [scheduling](https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/). |
 
 ----------------------------------------------
diff --git a/charts/guardrails/templates/_helpers.tpl b/charts/guardrails/templates/_helpers.tpl
index 94d31ad..5a9296b 100644
--- a/charts/guardrails/templates/_helpers.tpl
+++ b/charts/guardrails/templates/_helpers.tpl
@@ -42,6 +42,22 @@ app.kubernetes.io/managed-by: {{ .Release.Service }}
 {{- with .Values.commonLabels }}
 {{ toYaml . }}
 {{- end }}
+{{ include "guardrails.selectorLabels" . }}
+{{- end }}
+
+{{/*
+Cache labels
+*/}}
+{{- define "guardrails.cacheLabels" -}}
+helm.sh/chart: {{ include "guardrails.chart" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- with .Values.commonLabels }}
+{{ toYaml . }}
+{{- end }}
+{{ include "guardrails.cacheSelectorLabels" . }}
 {{- end }}
 
 {{/*
@@ -52,6 +68,14 @@ app.kubernetes.io/name: {{ include "guardrails.name" . }}
 app.kubernetes.io/instance: {{ .Release.Name }}
 {{- end }}
 
+{{/*
+Cache Selector labels
+*/}}
+{{- define "guardrails.cacheSelectorLabels" -}}
+app.kubernetes.io/name: {{ include "guardrails.name" . }}-nginx
+app.kubernetes.io/instance: {{ .Release.Name }}-nginx
+{{- end }}
+
 {{/*
 Create the name of the service account to use
 */}}
diff --git a/charts/guardrails/templates/deployment-nginx.yaml b/charts/guardrails/templates/deployment-nginx.yaml
index 450a3a6..ae070b4 100644
--- a/charts/guardrails/templates/deployment-nginx.yaml
+++ b/charts/guardrails/templates/deployment-nginx.yaml
@@ -4,12 +4,12 @@ kind: Deployment
 metadata:
   name: {{ .Release.Name }}-nginx
   labels:
-    {{- include "guardrails.labels" . | nindent 4 }}
+    {{- include "guardrails.cacheLabels" . | nindent 4 }}
 spec:
   replicas: {{ .Values.cache.replicaCount }}
   selector:
     matchLabels:
-      app: {{ .Release.Name }}-nginx
+      {{- include "guardrails.cacheSelectorLabels" . | nindent 8 }}
   template:
     metadata:
       {{- with .Values.cache.annotations }}
@@ -17,10 +17,7 @@ spec:
         {{- toYaml . | nindent 8 }}
       {{- end }}
       labels:
-        {{- include "guardrails.labels" . | nindent 8 }}
-        app: {{ .Release.Name }}-nginx
-        app.kubernetes.io/name: {{ include "guardrails.name" . }}-nginx
-        app.kubernetes.io/instance: {{ .Release.Name }}-nginx
+        {{- include "guardrails.cacheLabels" . | nindent 8 }}
     spec:
       serviceAccountName: {{ include "guardrails.serviceAccountName" . }}
       securityContext:
diff --git a/charts/guardrails/templates/deployment.yaml b/charts/guardrails/templates/deployment.yaml
index d1760f4..136aabd 100644
--- a/charts/guardrails/templates/deployment.yaml
+++ b/charts/guardrails/templates/deployment.yaml
@@ -11,7 +11,7 @@ spec:
   {{- end }}
   selector:
     matchLabels:
-      app: {{ .Release.Name }}
+      {{- include "guardrails.selectorLabels" . | nindent 8 }}
   template:
     metadata:
       {{- with .Values.podAnnotations }}
@@ -23,9 +23,6 @@ spec:
         {{- with .Values.podLabels }}
         {{- toYaml . | nindent 8 }}
         {{- end }}
-        app: {{ .Release.Name }}
-        app.kubernetes.io/name: {{ include "guardrails.name" . }}
-        app.kubernetes.io/instance: {{ .Release.Name }}
     spec:
       {{- if gt (len .Values.imagePullSecrets) 0 }}
       imagePullSecrets:
@@ -50,7 +47,7 @@ spec:
           env:
             {{- range $key, $value := .Values.env }}
             - name: {{ $key }}
-              value: {{ tpl $value $ }}
+              value: {{ tpl $value $ | quote }}
             {{- end }}
           {{- end }}
           {{- if .Values.envFrom }}
diff --git a/charts/guardrails/templates/service-nginx.yaml b/charts/guardrails/templates/service-nginx.yaml
index d6a835e..2362f01 100644
--- a/charts/guardrails/templates/service-nginx.yaml
+++ b/charts/guardrails/templates/service-nginx.yaml
@@ -11,5 +11,5 @@ spec:
       port: 80
       targetPort: 8080
   selector:
-    app: {{ .Release.Name }}-nginx
+    {{- include "guardrails.cacheSelectorLabels" . | nindent 4 }}
 {{- end }}
diff --git a/charts/guardrails/templates/service.yaml b/charts/guardrails/templates/service.yaml
index cfd0f73..085fe64 100644
--- a/charts/guardrails/templates/service.yaml
+++ b/charts/guardrails/templates/service.yaml
@@ -16,4 +16,4 @@ spec:
       port: {{ .Values.service.port }}
       targetPort: {{ .Values.service.targetPort }}
   selector:
-    app: {{ .Release.Name }}
+    {{- include "guardrails.selectorLabels" . | nindent 4 }}
diff --git a/charts/guardrails/values.yaml b/charts/guardrails/values.yaml
index 8f4771a..39d015d 100644
--- a/charts/guardrails/values.yaml
+++ b/charts/guardrails/values.yaml
@@ -68,10 +68,9 @@ commonLabels: {}
 # for the `guardrails` container. **Supports Helm templating syntax**, e.g. you can use `{{ .Release.Name }}` or other
 # templating variables, functions, and conditions within the the value of each environment variable.
 env:
-  # Uncomment WHYLABS_API_CACHE_ENDPOINT if .Values.cache.enable is true 
-  # WHYLABS_API_CACHE_ENDPOINT: "{{ .Release.Name }}.{{ .Release.Namespace }}.svc.cluster.local"
-  # @ignored
+  WHYLABS_API_CACHE_ENDPOINT: "{{ if .Values.cache.enable }}{{ .Release.Name }}.{{ .Release.Namespace }}.svc.cluster.local{{ else }}{{ end }}"
   TENANCY_MODE: "{{ .Values.tenancyMode | default \"SINGLE\" }}"
+  CONFIG_SYNC_INTERVAL: "1"
 
 # -- Create environment variables from Kubernetes secrets or config maps.
 envFrom:
@@ -229,7 +228,7 @@ startupProbe:
   periodSeconds: 10
 
 # -- (string) tenancyMode for the guardrails service. Must be `SINGLE` or `MULTI`.
-tenancyMode: MULTI
+tenancyMode: SINGLE
 
 # -- Node taints which will be tolerated for `Pod`
 # [scheduling](https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/).