diff --git a/chart/templates/deployment-ui.yaml b/chart/templates/deployment-ui.yaml
index d0852fc..94cbef7 100644
--- a/chart/templates/deployment-ui.yaml
+++ b/chart/templates/deployment-ui.yaml
@@ -32,6 +32,8 @@ spec:
         env:
           - name: LONGHORN_MANAGER_IP
             value: "http://longhorn-backend:9500"
+          - name: LONGHORN_UI_PORT
+            value: "8000"
       volumes:
       - emptyDir: {}
         name: nginx-cache
diff --git a/deploy/longhorn.yaml b/deploy/longhorn.yaml
index 027b352..7ddec57 100644
--- a/deploy/longhorn.yaml
+++ b/deploy/longhorn.yaml
@@ -3415,6 +3415,8 @@ spec:
         env:
           - name: LONGHORN_MANAGER_IP
             value: "http://longhorn-backend:9500"
+          - name: LONGHORN_UI_PORT
+            value: "8000"
       volumes:
       - emptyDir: {}
         name: nginx-cache