diff --git a/configure.ac b/configure.ac
index bfa154f90..e0fa67904 100644
--- a/configure.ac
+++ b/configure.ac
@@ -28,7 +28,7 @@ AC_CONFIG_MACRO_DIR([scripts])
 # 1.12.2 fixes a security issue in 1.11.2 and 1.12.1
 # 1.13 is required for parallel tests
 # 1.14.1 is required for %reldir% support
-AM_INIT_AUTOMAKE([1.14.1 foreign dist-xz color-tests silent-rules subdir-objects])
+AM_INIT_AUTOMAKE([1.15 foreign dist-xz color-tests silent-rules subdir-objects])
 # The following line causes --disable-maintainer-mode to be the default to
 # configure, this is necessary because libpng distributions cannot rely on the
 # time stamps of the autotools generated files being correct