diff --git a/CMakeLists.txt b/CMakeLists.txt
index 77554849..363c041f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,9 +28,9 @@ project(nghttp2 VERSION 1.39.90)
 
 # See versioning rule:
 #  http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
-set(LT_CURRENT  31)
-set(LT_REVISION 4)
-set(LT_AGE      17)
+set(LT_CURRENT  32)
+set(LT_REVISION 0)
+set(LT_AGE      18)
 
 set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake" ${CMAKE_MODULE_PATH})
 include(Version)
diff --git a/configure.ac b/configure.ac
index ad9f1254..2eb49144 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,9 +44,9 @@ m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 
 dnl See versioning rule:
 dnl  http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
-AC_SUBST(LT_CURRENT, 31)
-AC_SUBST(LT_REVISION, 4)
-AC_SUBST(LT_AGE, 17)
+AC_SUBST(LT_CURRENT, 32)
+AC_SUBST(LT_REVISION, 0)
+AC_SUBST(LT_AGE, 18)
 
 major=`echo $PACKAGE_VERSION |cut -d. -f1 | sed -e "s/[^0-9]//g"`
 minor=`echo $PACKAGE_VERSION |cut -d. -f2 | sed -e "s/[^0-9]//g"`