diff --git a/reana_workflow_controller/consumer.py b/reana_workflow_controller/consumer.py
index ec2d5296..342dd503 100644
--- a/reana_workflow_controller/consumer.py
+++ b/reana_workflow_controller/consumer.py
@@ -322,7 +322,7 @@ def _delete_dask_cluster(workflow: Workflow) -> None:
         group="kubernetes.dask.org",
         version="v1",
         plural="daskclusters",
-        namespace="default",
+        namespace=REANA_RUNTIME_KUBERNETES_NAMESPACE,
         name=f"reana-run-dask-{workflow.id_}",
     )
 
@@ -331,7 +331,7 @@ def _delete_dask_cluster(workflow: Workflow) -> None:
             group="kubernetes.dask.org",
             version="v1",
             plural="daskautoscalers",
-            namespace="default",
+            namespace=REANA_RUNTIME_KUBERNETES_NAMESPACE,
             name=f"dask-autoscaler-reana-run-dask-{workflow.id_}",
         )
 
diff --git a/reana_workflow_controller/dask.py b/reana_workflow_controller/dask.py
index 3c74a837..0d393707 100644
--- a/reana_workflow_controller/dask.py
+++ b/reana_workflow_controller/dask.py
@@ -17,6 +17,7 @@
     KRB5_STATUS_FILE_LOCATION,
     REANA_JOB_HOSTPATH_MOUNTS,
     WORKFLOW_RUNTIME_USER_UID,
+    REANA_RUNTIME_KUBERNETES_NAMESPACE,
 )
 from reana_commons.k8s.api_client import (
     current_k8s_custom_objects_api_client,
@@ -68,9 +69,7 @@ def __init__(
         self.cluster_spec = workflow_spec.get("resources", {}).get("dask", [])
         self.cluster_body = self._load_dask_cluster_template()
         self.cluster_image = self.cluster_spec["image"]
-        self.dask_scheduler_uri = (
-            f"{self.cluster_name}-scheduler.default.svc.cluster.local:8786"
-        )
+        self.dask_scheduler_uri = f"{self.cluster_name}-scheduler.{REANA_RUNTIME_KUBERNETES_NAMESPACE}.svc.cluster.local:8786"
 
         self.secrets_store = UserSecretsStore.fetch(self.user_id)
         self.secret_env_vars = self.secrets_store.get_env_secrets_as_k8s_spec()
@@ -486,7 +485,7 @@ def _create_dask_cluster(self):
                 group="kubernetes.dask.org",
                 version="v1",
                 plural="daskclusters",
-                namespace="default",
+                namespace=REANA_RUNTIME_KUBERNETES_NAMESPACE,
                 body=self.cluster_body,
             )
         except Exception:
@@ -502,7 +501,7 @@ def _create_dask_autoscaler(self):
                 group="kubernetes.dask.org",
                 version="v1",
                 plural="daskautoscalers",
-                namespace="default",
+                namespace=REANA_RUNTIME_KUBERNETES_NAMESPACE,
                 body=self.autoscaler_body,
             )
         except Exception:
diff --git a/reana_workflow_controller/k8s.py b/reana_workflow_controller/k8s.py
index e4a246b5..aab726ff 100644
--- a/reana_workflow_controller/k8s.py
+++ b/reana_workflow_controller/k8s.py
@@ -410,7 +410,10 @@ def create_dask_dashboard_ingress(cluster_name, workflow_id):
     middleware_spec = {
         "apiVersion": "traefik.io/v1alpha1",
         "kind": "Middleware",
-        "metadata": {"name": f"replacepath-{workflow_id}", "namespace": "default"},
+        "metadata": {
+            "name": f"replacepath-{workflow_id}",
+            "namespace": REANA_RUNTIME_KUBERNETES_NAMESPACE,
+        },
         "spec": {
             "replacePathRegex": {
                 "regex": f"/{workflow_id}/dashboard/*",
@@ -426,7 +429,7 @@ def create_dask_dashboard_ingress(cluster_name, workflow_id):
             name=f"dask-dashboard-ingress-{cluster_name}",
             annotations={
                 **REANA_INGRESS_ANNOTATIONS,
-                "traefik.ingress.kubernetes.io/router.middlewares": f"default-replacepath-{workflow_id}@kubernetescrd",
+                "traefik.ingress.kubernetes.io/router.middlewares": f"{REANA_RUNTIME_KUBERNETES_NAMESPACE}-replacepath-{workflow_id}@kubernetescrd",
             },
         ),
         spec=client.V1IngressSpec(
@@ -458,25 +461,27 @@ def create_dask_dashboard_ingress(cluster_name, workflow_id):
     current_k8s_custom_objects_api_client.create_namespaced_custom_object(
         group="traefik.io",
         version="v1alpha1",
-        namespace="default",
+        namespace=REANA_RUNTIME_KUBERNETES_NAMESPACE,
         plural="middlewares",
         body=middleware_spec,
     )
     # Create the ingress resource
     current_k8s_networking_api_client.create_namespaced_ingress(
-        namespace="default", body=ingress
+        namespace=REANA_RUNTIME_KUBERNETES_NAMESPACE, body=ingress
     )
 
 
 def delete_dask_dashboard_ingress(cluster_name, workflow_id):
     """Delete K8S Ingress Object for Dask dashboard."""
     current_k8s_networking_api_client.delete_namespaced_ingress(
-        name=cluster_name, namespace="default", body=client.V1DeleteOptions()
+        name=cluster_name,
+        namespace=REANA_RUNTIME_KUBERNETES_NAMESPACE,
+        body=client.V1DeleteOptions(),
     )
     current_k8s_custom_objects_api_client.delete_namespaced_custom_object(
         group="traefik.io",
         version="v1alpha1",
-        namespace="default",
+        namespace=REANA_RUNTIME_KUBERNETES_NAMESPACE,
         plural="middlewares",
         name=f"replacepath-{workflow_id}",
     )
diff --git a/reana_workflow_controller/workflow_run_manager.py b/reana_workflow_controller/workflow_run_manager.py
index e22f55d9..fb98e962 100644
--- a/reana_workflow_controller/workflow_run_manager.py
+++ b/reana_workflow_controller/workflow_run_manager.py
@@ -759,7 +759,7 @@ def _create_job_spec(
             job_controller_container.env.append(
                 {
                     "name": "DASK_SCHEDULER_URI",
-                    "value": f"reana-run-dask-{self.workflow.id_}-scheduler.default.svc.cluster.local:8786",
+                    "value": f"reana-run-dask-{self.workflow.id_}-scheduler.{REANA_RUNTIME_KUBERNETES_NAMESPACE}.svc.cluster.local:8786",
                 },
             )