diff --git a/libknet/Makefile.am b/libknet/Makefile.am
index c3c3157c..74108b20 100644
--- a/libknet/Makefile.am
+++ b/libknet/Makefile.am
@@ -1,149 +1,150 @@
 #
 # Copyright (C) 2010-2018 Red Hat, Inc.  All rights reserved.
 #
 # Authors: Fabio M. Di Nitto <fabbione@kronosnet.org>
 #          Federico Simoncelli <fsimon@kronosnet.org>
 #
 # This software licensed under GPL-2.0+, LGPL-2.0+
 #
 
 MAINTAINERCLEANFILES	= Makefile.in
 
 include $(top_srcdir)/build-aux/check.mk
 
 SYMFILE			= libknet_exported_syms
 
 EXTRA_DIST		= $(SYMFILE)
 
 SUBDIRS			= . tests
 
+# https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
 libversion		= 1:0:0
 
 # override global LIBS that pulls in lots of craft we don't need here
 LIBS			=
 
 sources			= \
 			  common.c \
 			  compat.c \
 			  compress.c \
 			  crypto.c \
 			  handle.c \
 			  host.c \
 			  links.c \
 			  logging.c \
 			  netutils.c \
 			  threads_common.c \
 			  threads_dsthandler.c \
 			  threads_heartbeat.c \
 			  threads_pmtud.c \
 			  threads_rx.c \
 			  threads_tx.c \
 			  transports.c \
 			  transport_common.c \
 			  transport_loopback.c \
 			  transport_udp.c \
 			  transport_sctp.c
 
 include_HEADERS		= libknet.h
 
 pkgconfigdir		= $(libdir)/pkgconfig
 
 pkgconfig_DATA		= libknet.pc
 
 noinst_HEADERS		= \
 			  common.h \
 			  compat.h \
 			  compress.h \
 			  compress_model.h \
 			  crypto.h \
 			  crypto_model.h \
 			  host.h \
 			  internals.h \
 			  links.h \
 			  logging.h \
 			  netutils.h \
 			  onwire.h \
 			  threads_common.h \
 			  threads_dsthandler.h \
 			  threads_heartbeat.h \
 			  threads_pmtud.h \
 			  threads_rx.h \
 			  threads_tx.h \
 			  transports.h \
 			  transport_common.h \
 			  transport_loopback.h \
 			  transport_udp.h \
 			  transport_sctp.h
 
 lib_LTLIBRARIES		= libknet.la
 
 libknet_la_SOURCES	= $(sources)
 
 libknet_la_CFLAGS	= $(AM_CFLAGS) $(PTHREAD_CFLAGS)
 
 EXTRA_libknet_la_DEPENDENCIES	= $(SYMFILE)
 
 libknet_la_LDFLAGS	= $(AM_LDFLAGS) \
 			  -Wl,--version-script=$(srcdir)/$(SYMFILE) \
 			  -Wl,-rpath=$(pkglibdir) \
-			  -version-number $(libversion)
+			  -version-info $(libversion)
 
 libknet_la_LIBADD	= $(PTHREAD_LIBS) $(dl_LIBS) $(rt_LIBS) $(m_LIBS)
 
 # Prepare empty value for appending
 pkglib_LTLIBRARIES	=
 
 # MODULE_LDFLAGS would mean a target-specific variable for Automake
 MODULELDFLAGS		= $(AM_LDFLAGS) -module -avoid-version -export-dynamic
 
 if BUILD_COMPRESS_ZLIB
 pkglib_LTLIBRARIES	+= compress_zlib.la
 compress_zlib_la_LDFLAGS = $(MODULELDFLAGS)
 compress_zlib_la_CFLAGS	= $(AM_CFLAGS) $(zlib_CFLAGS)
 compress_zlib_la_LIBADD	= $(zlib_LIBS)
 endif
 
 if BUILD_COMPRESS_LZ4
 pkglib_LTLIBRARIES	+= compress_lz4.la compress_lz4hc.la
 compress_lz4_la_LDFLAGS	= $(MODULELDFLAGS)
 compress_lz4_la_CFLAGS	= $(AM_CFLAGS) $(liblz4_CFLAGS)
 compress_lz4_la_LIBADD	= $(liblz4_LIBS)
 compress_lz4hc_la_LDFLAGS = $(MODULELDFLAGS)
 compress_lz4hc_la_CFLAGS = $(AM_CFLAGS) $(liblz4_CFLAGS)
 compress_lz4hc_la_LIBADD = $(liblz4_LIBS)
 endif
 
 if BUILD_COMPRESS_LZO2
 pkglib_LTLIBRARIES	+= compress_lzo2.la
 compress_lzo2_la_LDFLAGS = $(MODULELDFLAGS)
 compress_lzo2_la_CFLAGS	= $(AM_CFLAGS) $(lzo2_CFLAGS)
 compress_lzo2_la_LIBADD	= $(lzo2_LIBS)
 endif
 
 if BUILD_COMPRESS_LZMA
 pkglib_LTLIBRARIES	+= compress_lzma.la
 compress_lzma_la_LDFLAGS = $(MODULELDFLAGS)
 compress_lzma_la_CFLAGS	= $(AM_CFLAGS) $(liblzma_CFLAGS)
 compress_lzma_la_LIBADD	= $(liblzma_LIBS)
 endif
 
 if BUILD_COMPRESS_BZIP2
 pkglib_LTLIBRARIES	+= compress_bzip2.la
 compress_bzip2_la_LDFLAGS = $(MODULELDFLAGS)
 compress_bzip2_la_CFLAGS = $(AM_CFLAGS) $(bzip2_CFLAGS)
 compress_bzip2_la_LIBADD = $(bzip2_LIBS)
 endif
 
 if BUILD_CRYPTO_NSS
 pkglib_LTLIBRARIES	+= crypto_nss.la
 crypto_nss_la_LDFLAGS	= $(MODULELDFLAGS)
 crypto_nss_la_CFLAGS	= $(AM_CFLAGS) $(nss_CFLAGS)
 crypto_nss_la_LIBADD	= $(nss_LIBS)
 endif
 
 if BUILD_CRYPTO_OPENSSL
 pkglib_LTLIBRARIES	+= crypto_openssl.la
 crypto_openssl_la_LDFLAGS = $(MODULELDFLAGS)
 crypto_openssl_la_CFLAGS = $(AM_CFLAGS) $(openssl_CFLAGS)
 crypto_openssl_la_LIBADD = $(openssl_LIBS)
 endif
diff --git a/libtap/Makefile.am b/libtap/Makefile.am
index 07877a19..0690daea 100644
--- a/libtap/Makefile.am
+++ b/libtap/Makefile.am
@@ -1,60 +1,60 @@
 #
 # Copyright (C) 2010-2018 Red Hat, Inc.  All rights reserved.
 #
 # Author: Fabio M. Di Nitto <fabbione@kronosnet.org>
 #
 # This software licensed under GPL-2.0+, LGPL-2.0+
 #
 
 MAINTAINERCLEANFILES	= Makefile.in
 
 include $(top_srcdir)/build-aux/check.mk
 
 
 SYMFILE			= libtap_exported_syms
 
 EXTRA_DIST		= $(SYMFILE) tap_updown_bad tap_updown_good api-test-coverage
 
 sources			= libtap.c
 
 libversion		= 1:0:0
 
 AM_CFLAGS		+= $(PTHREAD_CFLAGS)
 LIBS			= $(PTHREAD_LIBS)
 
 if BUILD_LIBTAP
 
 include_HEADERS		= libtap.h
 
 pkgconfigdir		= $(libdir)/pkgconfig
 
 pkgconfig_DATA		= libtap.pc
 
 lib_LTLIBRARIES		= libtap.la
 
 libtap_la_SOURCES	= $(sources)
 
 EXTRA_libtap_la_DEPENDENCIES	= $(SYMFILE)
 
 libtap_la_LDFLAGS	= $(AM_LDFLAGS) \
 			  -Wl,-version-script,$(srcdir)/$(SYMFILE) \
-			  -version-number $(libversion)
+			  -version-info $(libversion)
 
 TESTS			= $(check_PROGRAMS)
 
 noinst_PROGRAMS		= $(check_PROGRAMS)
 
 check_PROGRAMS		= tap_test
 
 check-local: check-api-test-coverage
 
 check-api-test-coverage:
 	chmod u+x $(top_srcdir)/libtap/api-test-coverage
 	$(top_srcdir)/libtap/api-test-coverage $(top_srcdir) $(top_builddir)
 
 tap_test_SOURCES	= $(sources)
 
 tap_test_CPPFLAGS	= -DTEST \
 			  -DABSBUILDDIR=\"$(abs_builddir)\"
 
 endif