diff --git a/configure.ac b/configure.ac
index 95047080..6357ef1b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7,7 +7,7 @@ dnl Then use <https://github.com/cgwalters/git-evtag> to create a signed tag wit
 dnl release notes as its content.
 dnl Then, git push origin v201X.XX
 m4_define([year_version], [2018])
-m4_define([release_version], [8])
+m4_define([release_version], [9])
 m4_define([package_version], [year_version.release_version])
 AC_INIT([rpm-ostree], [package_version], [atomic-devel@projectatomic.io])
 AC_CONFIG_HEADER([config.h])
@@ -98,7 +98,7 @@ LIBS="$save_LIBS"
 # Remember to update AM_CPPFLAGS in Makefile.am when bumping GIO req.
 PKG_CHECK_MODULES(PKGDEP_GIO_UNIX, [gio-unix-2.0])
 PKG_CHECK_MODULES(PKGDEP_RPMOSTREE, [gio-unix-2.0 >= 2.50.0 json-glib-1.0
-				     ostree-1 >= 2018.7
+				     ostree-1 >= 2018.9
 				     libsystemd
 				     polkit-gobject-1
 				     rpm librepo libsolv