diff --git a/configure.ac b/configure.ac
index 9f151387..5f838545 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,10 +12,10 @@
 #
 # this defines the CORE version number, must be static for AC_INIT
 #
-AC_INIT(core, 4.6svn3, core-dev@pf.itd.nrl.navy.mil)
+AC_INIT(core, 4.6svn4, core-dev@pf.itd.nrl.navy.mil)
 VERSION=$PACKAGE_VERSION
 CORE_VERSION=$PACKAGE_VERSION
-CORE_VERSION_DATE=20131125
+CORE_VERSION_DATE=20131217
 COREDPY_VERSION=$PACKAGE_VERSION
 
 #