diff --git a/CHANGES b/CHANGES
index d4036311b..575060fe2 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,30 @@
+===============================================================================
+                               Changes in 1.1b1
+===============================================================================
+
+- Improved the API specification
+- Added a static initializer for ABT_mutex and ABT_cond
+- Fixed changes that break the ABI compatibility with Argobots 1.0.1
+- Supported Autoconf 2.70
+- Fixed several bugs
+
+===============================================================================
+                               Changes in 1.1a1
+===============================================================================
+
+- Added a tool interface to support a profiler (see ABTX_prof)
+- Improved work-unit-local storage support
+- Enhanced memory management of ULT stacks and descriptors
+- Added support for XLC, PGI, Solaris, and ARM HPC compilers
+- Improved support for affinity settings via an environmental variable
+- Fixed several bugs
+
+===============================================================================
+                               Changes in 1.0.1
+===============================================================================
+
+- Fixed the ABI string for the Argobots 1.0.x series.
+
 ===============================================================================
                                Changes in 1.0
 ===============================================================================
diff --git a/maint/version.m4 b/maint/version.m4
index 6387996bb..3c8b41823 100644
--- a/maint/version.m4
+++ b/maint/version.m4
@@ -3,7 +3,7 @@
 # See COPYRIGHT in top-level directory.
 #
 
-m4_define([ABT_VERSION_m4],[1.1a1])dnl
+m4_define([ABT_VERSION_m4],[1.1b1])dnl
 m4_define([ABT_RELEASE_DATE_m4],[unreleased development copy])dnl
 
 # For libtool ABI versioning rules see: