diff --git a/api/VERSION b/api/VERSION
index 81de5c5..99a89b9 100644
--- a/api/VERSION
+++ b/api/VERSION
@@ -1 +1 @@
-0.3.10
\ No newline at end of file
+0.3.11
\ No newline at end of file
diff --git a/api/server/metrics.py b/api/server/metrics.py
index 69fc7a9..e384d70 100644
--- a/api/server/metrics.py
+++ b/api/server/metrics.py
@@ -35,22 +35,24 @@ def get_prom_metrics():
     }
     num_task_in_q_gauge = Gauge(f"num_task_in_q",
                                 "Number of tasks in queue (not yet picked up by workers)",
-                                labelnames=("q_name","gen_timestamp"),
+                                labelnames=("q_name",),
                                 **common_kwargs)
     num_worker_gauge = Gauge("num_workers", "Number of workers", **common_kwargs)
     scheduled_gauge = Gauge("scheduled_tasks","Number of scheduled tasks",  labelnames=("hostname",), **common_kwargs)
     active_gauge = Gauge("active_tasks", "Number of active tasks", labelnames=("hostname",), **common_kwargs)
     reserved_gauge = Gauge("reserved_tasks", "Number of reserved tasks", labelnames=("hostname",), **common_kwargs)
-    
+    last_pinged = Gauge("last_pinged", "Last pinged time", labelnames=[], **common_kwargs)
 
     # assuming we are using redis as broker
     import redis
 
     _r = redis.from_url(CELERY_CONFIG.broker_url)
 
+    last_pinged.set_to_current_time()
+
     # number of tasks in queue
     for q in CELERY_CONFIG.task_queues.keys():
-        num_task_in_q_gauge.labels(q_name=q, gen_timestamp=time.ctime()).set(_r.llen(q))
+        num_task_in_q_gauge.labels(q_name=q).set(_r.llen(q))
 
     i = app.control.inspect()
 
diff --git a/requirements/siibra.txt b/requirements/siibra.txt
index a9f558f..d5cd7fe 100644
--- a/requirements/siibra.txt
+++ b/requirements/siibra.txt
@@ -1,2 +1 @@
-siibra>=0.4a59
-
+siibra>=0.4a61