diff --git a/oml/nodes.py b/oml/nodes.py
index c2ecb3f..86a85a8 100644
--- a/oml/nodes.py
+++ b/oml/nodes.py
@@ -479,9 +479,10 @@ class Nodes(Thread):
             return
         self._pulling = True
         for node in list(self._nodes.values()):
-            node.online = node.can_connect()
-            if node.online:
-                node.pullChanges()
+            if self._running:
+                node.online = node.can_connect()
+                if node.online:
+                    node.pullChanges()
         self._pulling = False
 
     def run(self):