diff --git a/micropython b/micropython
index b2caec3..399bf99 160000
--- a/micropython
+++ b/micropython
@@ -1 +1 @@
-Subproject commit b2caec3cc34c276d3cf68f89cd5f8ecc83acf1f9
+Subproject commit 399bf99ef1fc67dd7ccd8ee2a83c4091e4393109