--- a/configure.ac	Mon May 14 15:58:51 2018 +0200
+++ b/configure.ac	Mon May 14 17:56:03 2018 +0200
@@ -27,8 +27,9 @@
 #
 
 # the package version must match the macros in ucx.h
-AC_INIT([ucx], [1.1.0], [olaf.wintermann@gmail.com])
-AC_SUBST([UCX_LIB_VERSION], [2:0:1])
+# the lib version must follow the libtool versioning convention
+AC_INIT([ucx], [2.0.0], [olaf.wintermann@gmail.com])
+AC_SUBST([UCX_LIB_VERSION], [3:0:0])
 
 # don't place everything in the project root
 AC_CONFIG_AUX_DIR([build-aux])