diff --git a/SerialPort.cpp b/SerialPort.cpp
index 19c7f52..3ee2f21 100644
--- a/SerialPort.cpp
+++ b/SerialPort.cpp
@@ -73,9 +73,9 @@ const uint8_t MMDVM_DEBUG5       = 0xF5U;
 
 
 #if defined(EXTERNAL_OSC)
-#define DESCRIPTION              "MMDVM 20170406 TCXO (D-Star/DMR/System Fusion/P25/RSSI/CW Id)"
+#define DESCRIPTION              "MMDVM 20170501 TCXO (D-Star/DMR/System Fusion/P25/RSSI/CW Id)"
 #else
-#define DESCRIPTION              "MMDVM 20170406 (D-Star/DMR/System Fusion/P25/RSSI/CW Id)"
+#define DESCRIPTION              "MMDVM 20170501 (D-Star/DMR/System Fusion/P25/RSSI/CW Id)"
 #endif
 
 #if defined(GITVERSION)