diff --git a/scripts/stm32_mem.py b/scripts/stm32_mem.py
index 690657e..51a8537 100755
--- a/scripts/stm32_mem.py
+++ b/scripts/stm32_mem.py
@@ -184,7 +184,7 @@ if __name__ == "__main__":
 		print("Invoking DFU Device")
 		timeout = 0
 		while True :
-			sleep(0.5)
+			sleep(1)
 			timeout = timeout + 0.5
 			dfudev = stm32_scan(args, True)
 			if dfudev: break