diff --git a/Makefile.am b/Makefile.am
index 282170b..f66a3f7 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -5,5 +5,8 @@ dist_doc_DATA = LICENSE README.md
 
 lib_LTLIBRARIES = libe131.la
 libe131_la_SOURCES = src/e131.c
-libe131_la_LDFLAGS = -export-symbols-regex '^[eE]131_[^_]' -version-info 1:3:1
+libe131_la_LDFLAGS = -export-symbols-regex '^[eE]131_[^_]'
 include_HEADERS = src/e131.h
+
+# see: https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
+libe131_la_LDFLAGS += -version-info 1:4:0
diff --git a/configure.ac b/configure.ac
index f2d84e7..d58cfe0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.69])
-AC_INIT([libe131], [1.3.1], [hhromic@gmail.com])
+AC_INIT([libe131], [1.4.0], [hhromic@gmail.com])
 AM_INIT_AUTOMAKE([foreign subdir-objects -Wall -Werror])
 m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
 LT_INIT