diff --git a/tools/pyboard.py b/tools/pyboard.py
index 55c00fbca1944..2dabcc8be9ae8 100755
--- a/tools/pyboard.py
+++ b/tools/pyboard.py
@@ -268,7 +268,7 @@ def __init__(
             import serial
 
             # Set options, and exclusive if pyserial supports it
-            serial_kwargs = {"baudrate": baudrate, "interCharTimeout": 1}
+            serial_kwargs = {"baudrate": baudrate, "interCharTimeout": 1, "timeout": 10}
             if serial.__version__ >= "3.3":
                 serial_kwargs["exclusive"] = exclusive