diff --git a/py/mpconfig.h b/py/mpconfig.h
index 9a7eb1b15..eb3a0eb73 100644
--- a/py/mpconfig.h
+++ b/py/mpconfig.h
@@ -28,7 +28,7 @@
 
 // Current version of MicroPython
 #define MICROPY_VERSION_MAJOR 1
-#define MICROPY_VERSION_MINOR 20
+#define MICROPY_VERSION_MINOR 21
 #define MICROPY_VERSION_MICRO 0
 
 // Combined version as a 32-bit number for convenience