diff --git a/esp32/pycom_version.h b/esp32/pycom_version.h
index 2a3c9af11..596de86ae 100644
--- a/esp32/pycom_version.h
+++ b/esp32/pycom_version.h
@@ -10,7 +10,7 @@
 #ifndef VERSION_H_
 #define VERSION_H_
 
-#define SW_VERSION_NUMBER                              "1.20.3.b2"
+#define SW_VERSION_NUMBER                              "1.20.3.b3"
 
 #define LORAWAN_VERSION_NUMBER                         "1.0.2"