diff --git a/.gitignore b/.gitignore
index f797d6f..f6fe842 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@
 /gdk3-3.0.9.gem
 /gdk3-3.1.0.gem
 /gdk3-3.1.1.gem
+/gdk3-3.1.3.gem
diff --git a/rubygem-gdk3.spec b/rubygem-gdk3.spec
index 49a5df7..494d1f4 100644
--- a/rubygem-gdk3.spec
+++ b/rubygem-gdk3.spec
@@ -5,8 +5,8 @@
 # Planned for F-20+ only
 Summary:	Ruby binding of GDK-3.x
 Name:		rubygem-%{gem_name}
-Version:	3.1.1
-Release:	2%{?dist}
+Version:	3.1.3
+Release:	1%{?dist}
 
 Group:		Development/Languages
 # Various files in gem
@@ -85,7 +85,8 @@ find . -name \*.rb -print0 | xargs --null chmod 0644
 gem specification -l --ruby %{SOURCE0} > %{gem_name}.gemspec
 
 # Allow ruby-gnome2 no less than ones
-sed -i -e 's|= 3\.1\.1|>= 3.1.1|' %{gem_name}.gemspec
+sed -i -e 's|= 3\.1\.3|>= 3.1.3|' %{gem_name}.gemspec
+sed -i -e '\@s\.extensions@d'  %{gem_name}.gemspec
 
 # Add license text
 install -cpm 644 %{SOURCE1} ./COPYING.LIB
@@ -101,8 +102,6 @@ rm -rf tmpunpackdir
 %build
 mkdir -p .%{gem_dir}
 
-export CONFIGURE_ARGS="--with-cflags='%{optflags} -Werror-implicit-function-declaration'"
-export CONFIGURE_ARGS="$CONFIGURE_ARGS --with-pkg-config-dir=$(pwd)%{_libdir}/pkgconfig"
 %gem_install
 
 %install
@@ -131,6 +130,7 @@ install -cpm 644 ./%{_libdir}/pkgconfig/*.pc \
 # Cleanups
 pushd %{buildroot}
 rm -rf .%{gem_instdir}/ext/
+rm -rf .%{gem_instdir}/dependency-check/
 rm -f .%{gem_instdir}/extconf.rb
 popd
 
@@ -165,25 +165,17 @@ popd
 %dir	%{gem_instdir}/lib/%{gem_name}/
 %{gem_instdir}/lib/%{gem_name}/*.rb
 
-%if 0
-%{gem_extdir_mri}/
-%endif
-
 %exclude %{gem_cache}
 %{gem_spec}
 
-%if 0
-%files	devel
-%{_libdir}/pkgconfig/ruby-%{gem_name}.pc
-%{header_dir}/rbgdk3.h
-%{header_dir}/rbgdk3conversions.h
-%endif
-
 %files	doc
 %doc	%{gem_docdir}/
 %exclude	%{gem_instdir}/test/
 
 %changelog
+* Thu May  4 2017 Mamoru TASAKA <mtasaka@fedoraproject.org> - 3.1.3-1
+- 3.1.3
+
 * Sat Feb 11 2017 Fedora Release Engineering <releng@fedoraproject.org> - 3.1.1-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
 
diff --git a/sources b/sources
index 98c42bc..5c5d259 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (gdk3-3.1.1.gem) = 6bea28eb802d0467e43a430f7978c249849e8e7803b36abb2594b8ea0512e415d1bdc0a2a65daaee0b9159f1e23882fe63646ca28c3e54945b44a69c8827c8d4
+SHA512 (gdk3-3.1.3.gem) = 6505c57fa1ea3780503a65eb75143309fd5ddb896f3c8099e2df68542351d9805eb59c1ff344491596ff45b185c8f454c2c0d8dda3a78a60f5ad39ceb16f0ba2