diff --git a/helm/oauth2-proxy/templates/deployment.yaml b/helm/oauth2-proxy/templates/deployment.yaml
index b896864..ee280d0 100644
--- a/helm/oauth2-proxy/templates/deployment.yaml
+++ b/helm/oauth2-proxy/templates/deployment.yaml
@@ -72,6 +72,8 @@ spec:
         - name: OAUTH2_PROXY_REDIS_CONNECTION_URL
           value: {{ include "oauth2-proxy.redis.StandaloneUrl" . }}
         {{- else if eq (default "" .Values.sessionStorage.redis.clientType) "cluster" }}
+        - name: OAUTH2_PROXY_REDIS_USE_CLUSTER
+          value: "true"
         - name: OAUTH2_PROXY_REDIS_CLUSTER_CONNECTION_URLS
           value: {{ .Values.sessionStorage.redis.cluster.connectionUrls }}
         {{- else if eq (default "" .Values.sessionStorage.redis.clientType) "sentinel" }}