diff --git a/sslyze/concurrent_scanner.py b/sslyze/concurrent_scanner.py
index 43ee5776..58d068a0 100644
--- a/sslyze/concurrent_scanner.py
+++ b/sslyze/concurrent_scanner.py
@@ -120,7 +120,7 @@ def _check_and_create_process(self, hostname):
             else:
                 # We are already using the maximum number of processes
                 # Do not create a process and re-use a random existing hostname queue
-                self._hostname_queues_dict[hostname] = random.choice(self._hostname_queues_dict.values())
+                self._hostname_queues_dict[hostname] = random.choice(list(self._hostname_queues_dict.values()))
                 self._processes_dict[hostname] = []
 
         else: