diff --git a/Changelog b/Changelog
index 48d6cb7d..fd104f0a 100644
--- a/Changelog
+++ b/Changelog
@@ -1,3 +1,39 @@
+2015-05-21 CORE 4.8rc1
+  * EMANE:
+    - support for EMANE 0.9.2
+    - run emane in each container when using EMANE 0.9.2
+    - support using separate control networks for EMANE OTA and event traffic
+  * GUI:
+    - fixed an issue where the adjacency widget lines pointed to old node positions
+    - fixed an issue where not all EMANE 0.9.x IEEE 802.11 MAC parameter were configurable
+    - fixed an issue related to running python scripts from the GUI when using tcl/tk version 8.6
+    - improved batch mode execution to display the check emulation light status
+    - improved managing multiple sessions
+    - improved support for using multiple canvases
+    - added a reload option to the file menu to revert back to a saved scenario
+  * DAEMON:
+    - support exporting scenarios in NRL Network Modeling Framework 1.0 XML format
+    - support importing scenarios in NRL Network Modeling Framework 1.0 XML format
+    - support exporting the deployed scenario state in NRL NMF XML 1.0 format
+    - improved EMANE post-startup processing to better synchronize distributed emulations
+    - improved how addresses are assigned to tun/tap devices
+    - added support for python state-change callbacks
+  * SERVICES:
+    - added mgen sink and mgen actor services
+    - added oslrv2 and olsr.org services
+    - added a docker service
+  * BUILD:
+    - improved the install/uninstall process
+    - improved debian and rpm packaging
+  * BUGFIXES:
+    - updated the http service for ubuntu 14.04
+    - improved included examples
+    - shortened the length of network interface names
+    - improved how the core system service manages running the core daemon
+    - fixed an issues related to applying session configuration setting
+    - improved detecting when a distributed emulation is already running
+    - improved documentation
+
 2014-08-06 CORE 4.7
 
   * EMANE:
diff --git a/configure.ac b/configure.ac
index 83b7de8b..8ac94c8b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,7 +12,7 @@
 #
 # this defines the CORE version number, must be static for AC_INIT
 #
-AC_INIT(core, 4.7svn3, core-dev@pf.itd.nrl.navy.mil)
+AC_INIT(core, 4.8rc1, core-dev@pf.itd.nrl.navy.mil)
 VERSION=$PACKAGE_VERSION
 CORE_VERSION=$PACKAGE_VERSION
 CORE_VERSION_DATE=20141010