diff --git a/Modem.cpp b/Modem.cpp
index bc4f002..15235c5 100644
--- a/Modem.cpp
+++ b/Modem.cpp
@@ -916,7 +916,7 @@ bool CModem::readVersion()
 			}
 		}
 
-		CThread::sleep(1000U);
+		CThread::sleep(1500U);
 	}
 
 	LogError("Unable to read the firmware version after six attempts");