diff --git a/ChangeLog b/ChangeLog
index d90fa3b..fb04bac 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2005-12-17  Richard B. Kreckel  <kreckel@ginac.de>
+
+	* Created branch cln_1-1 for maintenance patches.
+	This is the main branch, which will eventually become CLN 1.2.0.
+
 2005-12-15  Dmitry V. Kustov  <kustov@telex221.ru>
 
 	* src/base/random/cl_random_from.cc: Add support for OpenBSD.
diff --git a/configure.ac b/configure.ac
index 1e6ce03..37ebf1d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -82,8 +82,8 @@ dnl * if any functions/classes have been added, increment CL_AGE,
 dnl * if backwards compatibility has been broken, set CL_AGE to 0.
 dnl $(CL_CURRENT):$(CL_REVISION):$(CL_AGE) results in
 dnl libcln.so.$(CL_CURRENT)-$(CL_AGE)
-CL_CURRENT=4
-CL_REVISION=1
+CL_CURRENT=5
+CL_REVISION=0
 CL_AGE=0
 dnl make substitutions
 AC_SUBST(CL_CURRENT)
@@ -91,8 +91,8 @@ AC_SUBST(CL_REVISION)
 AC_SUBST(CL_AGE)
 dnl release version
 CL_VERSION_MAJOR=1
-CL_VERSION_MINOR=1
-CL_VERSION_PATCHLEVEL=11
+CL_VERSION_MINOR=2
+CL_VERSION_PATCHLEVEL=0
 dnl release version for cln/config.h, so it can be tested by the preprocessor
 AC_DEFINE_UNQUOTED(CL_VERSION_MAJOR, $CL_VERSION_MAJOR)
 AC_DEFINE_UNQUOTED(CL_VERSION_MINOR, $CL_VERSION_MINOR)