Updated CHANGELOG.txt

diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index eeac6cd..9ab1135 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,3 +1,6 @@
+v1.21 (November 1, 2012)
+- Fixed small error
+
 v1.20 (November 1, 2012)
 - Code catch up with ElvUI
 - Some code restructure to reduce memory