diff --git a/RELEASE_NOTES.txt b/RELEASE_NOTES.txt
index e191d547c..20b194d78 100644
--- a/RELEASE_NOTES.txt
+++ b/RELEASE_NOTES.txt
@@ -1,3 +1,16 @@
+Release 4.5.11
+-------------------
+
+This is a maintenance release that fixes a number defects discovered since 4.5.10.
+
+
+Changelog:
+-------------------
+
+* Added family property #145.
+  Contributed by behrangsa
+
+
 Release 4.5.10
 -------------------