diff --git a/server/server.py b/server/server.py
index 7896f8ebc..da51e73c3 100644
--- a/server/server.py
+++ b/server/server.py
@@ -419,7 +419,7 @@ def memorypool_update(store):
 
 def clean_session_thread():
     while not stopping:
-        time.sleep(30)
+        time.sleep(3)
         t = time.time()
         for k,t0 in sessions_last_time.items():
             if t - t0 > 60: