diff --git a/.gitignore b/.gitignore
index fdd73c0..94f763f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -50,3 +50,5 @@
 /gtk3-3.3.6-test-missing-files.tar.gz
 /gtk3-3.3.7.gem
 /gtk3-3.3.7-test-missing-files.tar.gz
+/gtk3-3.4.0.gem
+/gtk3-3.4.0-test-missing-files.tar.gz
diff --git a/rubygem-gtk3.spec b/rubygem-gtk3.spec
index 2757a94..09b7018 100644
--- a/rubygem-gtk3.spec
+++ b/rubygem-gtk3.spec
@@ -7,7 +7,7 @@
 # Planned for F-20+ only
 Summary:	Ruby/GTK3 is a Ruby binding of GTK+-3.x
 Name:		rubygem-%{gem_name}
-Version:	3.3.7
+Version:	3.4.0
 Release:	1%{?dist}
 
 # Various files in gem
@@ -89,7 +89,7 @@ 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\.3\.7|>= 3.3.7|' %{gem_name}.gemspec
+sed -i -e 's|= 3\.4\.0|>= 3.4.0|' %{gem_name}.gemspec
 
 # Add license text
 install -cpm 644 %{SOURCE1} ./COPYING.LIB
@@ -201,7 +201,10 @@ popd
 %exclude	%{gem_instdir}/test/
 
 %changelog
-* Sun Sep  8 2019 2019 Mamoru TASAKA <mtasaka@fedoraproject.org> - 3.3.7-1
+* Tue Oct 15 2019 Mamoru TASAKA <mtasaka@fedoraproject.org> - 3.4.0-1
+- 3.4.0
+
+* Sun Sep  8 2019 Mamoru TASAKA <mtasaka@fedoraproject.org> - 3.3.7-1
 - 3.3.7
 
 * Fri Jul 26 2019 Fedora Release Engineering <releng@fedoraproject.org> - 3.3.6-2
diff --git a/sources b/sources
index e3300bc..e8a310a 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (gtk3-3.3.7.gem) = faa3e169189704d05b0d4707afe097ca389358897a801724fea3f142c184ea16824e39457361e574091ad865a9f680fbf51258c6819bd104720696a2c2f61df7
-SHA512 (gtk3-3.3.7-test-missing-files.tar.gz) = 6a0ad7f76a3b817bec9ba2201beb77af979d0c083ed3cd739d2850e726c97f4164721360955108e903e291bee789b646997a02e158a30da3c3f1e2e68cad09be
+SHA512 (gtk3-3.4.0.gem) = abf22325699c171d1fc9b6de82b3c64068f5a1e5d22196e5f6101f206fe9de56976f15c5c14cbb2f8ab607413d6a8dc6d542122a356536d7d155e15cfc94a69d
+SHA512 (gtk3-3.4.0-test-missing-files.tar.gz) = 6a27a8f2cf6d9cf4172552dd56c431eff867450478e6f81949fe62dedab908725c789b760f7c904edb85e6f1cc5a89d21a04050225345bce67afb16a80ed870a