diff --git a/RELEASE_NOTES.txt b/RELEASE_NOTES.txt
index 17e6a3ea5fdaf2feaf28238f43c487848bffd998..5081e36760a03d96167617cfac9203206f8bba11 100644
--- a/RELEASE_NOTES.txt
+++ b/RELEASE_NOTES.txt
@@ -1,3 +1,9 @@
+Release 2.2.1 (02/04/2019)
+=============================
+- Updated API documentation
+- DM Station GUI fixes/enhancements:
+  - Added file compression capability
+
 Release 2.2.0 (01/15/2019)
 =============================
 - Added ESAF interfaces to APS DB service