diff --git a/Tools/px_uploader.py b/Tools/px_uploader.py
index 36212ed488..ddc290a80f 100755
--- a/Tools/px_uploader.py
+++ b/Tools/px_uploader.py
@@ -214,6 +214,10 @@ class uploader(object):
                 except OSError:
                     # wait for the port to be ready
                     time.sleep(0.04)
+                except serial.SerialException:
+                    # if open fails, try again later
+                    time.sleep(0.04)
+
             else:
                 break