diff --git a/.gitignore b/.gitignore
index f5a635d..4bfd19a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@
 /msgpack-0.5.9.tar.gz
 /msgpack-1.3.0.tar.gz
 /msgpack-1.4.1.tar.gz
+/msgpack-1.4.2.tar.gz
diff --git a/msgpack.spec b/msgpack.spec
index 353a84d..02470ab 100644
--- a/msgpack.spec
+++ b/msgpack.spec
@@ -1,6 +1,6 @@
 Name:		msgpack
-Version:	1.4.1
-Release:	2%{?dist}
+Version:	1.4.2
+Release:	1%{?dist}
 Summary:	Binary-based efficient object serialization library
 Group:		System Environment/Libraries
 
@@ -34,6 +34,7 @@ Libraries and header files for %{name}
 
 
 %build
+sed -i 's/ -Werror / /g' configure.in
 autoreconf -f -i
 %configure --disable-static
 make %{?_smp_mflags}
@@ -66,6 +67,10 @@ find $RPM_BUILD_ROOT -name '*.la' -exec rm -f '{}' ';'
 
 
 %changelog
+* Tue Feb 21 2017 Daiki Ueno <dueno@redhat.com> - 1.4.2-1
+- new upstream release
+- avoid FTBFS with GCC7
+
 * Fri Feb 10 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1.4.1-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
 
diff --git a/sources b/sources
index 5ae5e53..c768540 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-fde8da1388d4f8daf21faee5536a53cf  msgpack-1.4.1.tar.gz
+SHA512 (msgpack-1.4.2.tar.gz) = c2da1d3bcc4e3dbcd93e005c63796e52e071d47ccd18434d4d3483b2e8255cf89ade746392decaa50e3911ca0134bb0da88b3b2ada9acfba0d331dfd48843548