diff --git a/CHANGES.rst b/CHANGES.rst
index 3a5d91a..648b3da 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,12 @@
 CHANGES
 =======
 
+2.1.x (20xx-0x-xx)
+------------------
+
+- fix that different results with different chuck sizes
+- fix that assignments to nsSMState in nsCodingStateMachine result in unspecified behavior
+
 2.1.0 (2017-05-15)
 ------------------
 
diff --git a/src/ext/uchardet b/src/ext/uchardet
index a2d24a5..4e8b86b 160000
--- a/src/ext/uchardet
+++ b/src/ext/uchardet
@@ -1 +1 @@
-Subproject commit a2d24a50fa23d71f543501168bfe9b3a859c83cd
+Subproject commit 4e8b86bffc67a37b5ea1e5ecdd1ce2cec7ad97a1