diff --git a/configure.ac b/configure.ac
index eef6ae3d..f37d33f3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,14 +25,14 @@ dnl Do not change user variables!
 dnl http://www.gnu.org/software/automake/manual/html_node/Flag-Variables-Ordering.html
 
 AC_PREREQ(2.61)
-AC_INIT([nghttp2], [0.7.5-DEV], [t-tujikawa@users.sourceforge.net])
+AC_INIT([nghttp2], [0.7.5], [t-tujikawa@users.sourceforge.net])
 LT_PREREQ([2.2.6])
 LT_INIT()
 dnl See versioning rule:
 dnl  http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
-AC_SUBST(LT_CURRENT, 10)
+AC_SUBST(LT_CURRENT, 11)
 AC_SUBST(LT_REVISION, 0)
-AC_SUBST(LT_AGE, 5)
+AC_SUBST(LT_AGE, 6)
 
 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"`