diff --git a/oml/nodes.py b/oml/nodes.py
index 85ee9b7..7487ca3 100644
--- a/oml/nodes.py
+++ b/oml/nodes.py
@@ -448,6 +448,9 @@ class Node(Thread):
         except socket.timeout:
             logger.debug('timeout %s', url)
             return False
+        except urllib.error.URLError as e:
+            logger.debug('urllib.error.URLError %s', e)
+            return False
         except socks.GeneralProxyError:
             logger.debug('download failed %s', url)
             return False