diff --git a/providers/kubernetes/daskhub.yaml b/providers/kubernetes/daskhub.yaml
index f27ab52..115671a 100644
--- a/providers/kubernetes/daskhub.yaml
+++ b/providers/kubernetes/daskhub.yaml
@@ -19,23 +19,27 @@ dask-gateway:
         c.ClusterConfig.cluster_max_workers = 4
         c.ClusterConfig.idle_timeout = 1800
       optionHandler: |
-        from dask_gateway_server.options import Options, Integer, Float, String
+        from dask_gateway_server.options import Options, Integer, Float, String, Mapping
 
-        def options_handler(options):
-          if ":" not in options.image:
-            raise ValueError("When specifying an image you must also provide a tag")
-          return {
-            "worker_cores": options.worker_cores,
-            "worker_memory": int(options.worker_memory * 2 ** 30),
-            "image": options.image,
-          }
+        def cluster_options(user):
+            def option_handler(options):
+                if ":" not in options.image:
+                    raise ValueError("When specifying an image you must also provide a tag")
 
-        c.Backend.cluster_options = Options(
-          Integer("worker_cores", default=1, min=1, max=8, label="Worker Cores"),
-          Float("worker_memory", default=2, min=2, max=32, label="Worker Memory (GiB)"),
-          String("image", default="quay.io/pangeo/pangeo-notebook:2025.06.02", label="Image"),
-          handler=options_handler,
-        )
+                return {
+                    "worker_cores": options.worker_cores,
+                    "worker_memory": int(options.worker_memory * 2 ** 30),
+                    "image": options.image,
+                    "environment_vars": options.environment_vars,
+                }
+            return Options(
+                Integer("worker_cores", default=1, min=1, max=1, label="Worker Cores"),
+                Float("worker_memory", default=2, min=2, max=7, label="Worker Memory (GiB)"),
+                String("image", default="quay.io/pangeo/pangeo-notebook:2025.06.02", label="Image"),
+                Mapping("environment_vars", {}, label="Environment Variables"),
+                handler=options_handler,
+            )
+        c.Backend.cluster_options = cluster_options
     prefix: /services/dask-gateway
     backend:
       scheduler: