diff --git a/tools/distgraphlaunch.py b/tools/distgraphlaunch.py
index 856cf10c3df4..6c5866f2e94f 100644
--- a/tools/distgraphlaunch.py
+++ b/tools/distgraphlaunch.py
@@ -129,7 +129,7 @@ def run(ssh_cmd):
         subprocess.check_call(ssh_cmd, shell=True)
 
     thread = Thread(target=run, args=(ssh_cmd,))
-    thread.setDaemon(True)
+    thread.daemon = True
     thread.start()
     return thread
 
diff --git a/tools/launch.py b/tools/launch.py
index 53d314111621..bf04df51b66f 100644
--- a/tools/launch.py
+++ b/tools/launch.py
@@ -145,7 +145,7 @@ def run(ssh_cmd, state_q):
             state_q,
         ),
     )
-    thread.setDaemon(True)
+    thread.daemon = True
     thread.start()
     # sleep for a while in case of ssh is rejected by peer due to busy connection
     time.sleep(0.2)