diff --git a/src/lib/asiolink/Makefile.am b/src/lib/asiolink/Makefile.am
index e7369a7a8b..a2ba91c53d 100644
--- a/src/lib/asiolink/Makefile.am
+++ b/src/lib/asiolink/Makefile.am
@@ -17,7 +17,7 @@ CLEANFILES = *.gcno *.gcda
 
 lib_LTLIBRARIES = libkea-asiolink.la
 
-libkea_asiolink_la_LDFLAGS = -no-undefined -version-info 19:0:0
+libkea_asiolink_la_LDFLAGS = -no-undefined -version-info 20:0:0
 
 libkea_asiolink_la_SOURCES  = asiolink.h
 libkea_asiolink_la_SOURCES += asio_wrapper.h
diff --git a/src/lib/dhcpsrv/Makefile.am b/src/lib/dhcpsrv/Makefile.am
index ecd07ec0e3..8ff404f940 100644
--- a/src/lib/dhcpsrv/Makefile.am
+++ b/src/lib/dhcpsrv/Makefile.am
@@ -224,7 +224,7 @@ libkea_dhcpsrv_la_LIBADD  += $(top_builddir)/src/lib/util/libkea-util.la
 libkea_dhcpsrv_la_LIBADD  += $(top_builddir)/src/lib/exceptions/libkea-exceptions.la
 libkea_dhcpsrv_la_LIBADD  += $(LOG4CPLUS_LIBS) $(CRYPTO_LIBS) $(BOOST_LIBS)
 
-libkea_dhcpsrv_la_LDFLAGS  = -no-undefined -version-info 37:0:0
+libkea_dhcpsrv_la_LDFLAGS  = -no-undefined -version-info 38:0:0
 libkea_dhcpsrv_la_LDFLAGS += $(CRYPTO_LDFLAGS)
 if HAVE_MYSQL
 libkea_dhcpsrv_la_LDFLAGS += $(MYSQL_LIBS)
diff --git a/src/lib/hooks/hooks.h b/src/lib/hooks/hooks.h
index 701d828b6a..9c57fbb31e 100644
--- a/src/lib/hooks/hooks.h
+++ b/src/lib/hooks/hooks.h
@@ -12,7 +12,7 @@
 
 namespace {
 
-// Version 21 of the hooks framework, set for Kea 1.9.0
+// Version 10900 of the hooks framework, set for Kea 1.9.0
 const int KEA_HOOKS_VERSION = 10900;
 
 // Names of the framework functions.
diff --git a/src/lib/http/Makefile.am b/src/lib/http/Makefile.am
index 1e279e27de..cbd448edf5 100644
--- a/src/lib/http/Makefile.am
+++ b/src/lib/http/Makefile.am
@@ -45,7 +45,7 @@ libkea_http_la_SOURCES += basic_auth_config.cc basic_auth_config.h
 libkea_http_la_CXXFLAGS = $(AM_CXXFLAGS)
 libkea_http_la_CPPFLAGS = $(AM_CPPFLAGS)
 libkea_http_la_LDFLAGS  = $(AM_LDFLAGS)
-libkea_http_la_LDFLAGS += -no-undefined -version-info 18:0:1
+libkea_http_la_LDFLAGS += -no-undefined -version-info 19:0:1
 
 libkea_http_la_LIBADD  =
 libkea_http_la_LIBADD += $(top_builddir)/src/lib/asiolink/libkea-asiolink.la
diff --git a/src/lib/util/Makefile.am b/src/lib/util/Makefile.am
index f6e2049fa2..b091deed1b 100644
--- a/src/lib/util/Makefile.am
+++ b/src/lib/util/Makefile.am
@@ -48,7 +48,7 @@ libkea_util_la_SOURCES += random/random_number_generator.h
 
 libkea_util_la_LIBADD = $(top_builddir)/src/lib/exceptions/libkea-exceptions.la
 
-libkea_util_la_LDFLAGS  = -no-undefined -version-info 26:0:0
+libkea_util_la_LDFLAGS  = -no-undefined -version-info 27:0:0
 
 EXTRA_DIST = util.dox