diff --git a/.gitignore b/.gitignore
index 974c1f3..3e6c166 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,5 @@
 /rubygem-rabbit-2.2.0-test-missing-files.tar.gz
 /rabbit-2.2.1.gem
 /rubygem-rabbit-2.2.1-test-missing-files.tar.gz
+/rabbit-3.0.0.gem
+/rubygem-rabbit-3.0.0-test-missing-files.tar.gz
diff --git a/rubygem-rabbit.spec b/rubygem-rabbit.spec
index a197177..d92facd 100644
--- a/rubygem-rabbit.spec
+++ b/rubygem-rabbit.spec
@@ -5,8 +5,8 @@ BuildRequires:	%1 \
 %{nil}
 
 Name:		rubygem-%{gem_name}
-Version:	2.2.1
-Release:	6%{?dist}
+Version:	3.0.0
+Release:	1%{?dist}
 
 Summary:	RD-document-based presentation application
 # CC-BY: rubykaigi2011-background-white.jpg and
@@ -22,6 +22,8 @@ Source0:	https://rubygems.org/gems/%{gem_name}-%{version}.gem
 Source1:	%{name}-%{version}-test-missing-files.tar.gz
 Source10:	rabbit.desktop
 Source11:	rabbit.xml
+# Rescue kramdown 1
+Patch1:	rubygem-rabbit-3.0.0-rescue-kramdown1.patch
 
 %BothRequires	ruby(release)
 BuildRequires:	rubygems-devel
@@ -30,10 +32,11 @@ Requires:	ruby(rubygems)
 %BothRequires	rubygem(coderay)
 %BothRequires	rubygem(faraday)
 %BothRequires	rubygem(gettext)
-%BothRequires	rubygem(gtk2)
-%BothRequires	rubygem(gio2)
+%BothRequires	rubygem(gdk_pixbuf2)
+%BothRequires	rubygem(gtk3)
 %BothRequires	rubygem(hikidoc)
 %BothRequires	rubygem(kramdown)
+Requires:		(( rubygem-kramdown < 1.18 ) or ( ( rubygem-kramdown >= 2.0 ) and rubygem-kramdown-parser-gfm ))
 %BothRequires	rubygem(nokogiri)
 %BothRequires	rubygem(poppler)
 %BothRequires	rubygem(rouge)
@@ -71,6 +74,10 @@ gem unpack %{SOURCE0}
 %setup -q -D -T -n  %{gem_name}-%{version}
 
 gem spec %{SOURCE0} -l --ruby > %{gem_name}.gemspec
+# For now, relax kramdown series dependency
+sed -i %{gem_name}.gemspec -e 's|kramdown-parser-gfm|kramdown|'
+
+%patch1 -p1
 
 %build
 gem build %{gem_name}.gemspec
@@ -158,6 +165,10 @@ popd
 %doc	%{gem_instdir}/sample/	
 
 %changelog
+* Mon Sep  9 2019 Mamoru TASAKA <mtasaka@fedoraproject.org> - 3.0.0-1
+- 3.0.0
+- Relax kramdown dependency, handle both kramdown 1.17 and 2 case
+
 * Fri Jul 26 2019 Fedora Release Engineering <releng@fedoraproject.org> - 2.2.1-6
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild
 
diff --git a/sources b/sources
index 04fa0f7..4af665c 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (rabbit-2.2.1.gem) = c30f8fc09366e8676c8502854c9186459b1609110ab4f80ebac3e3b272f805410e69718c2d217f4cd29f10518d3a925de7c7dcda44d4a7f999db2ec48e0c3173
-SHA512 (rubygem-rabbit-2.2.1-test-missing-files.tar.gz) = d6a8ad5ac277dd43af69e2fbd2ad4545a9a0fb09cb97954770b1b94d0602deedf00333f23ecf33924114fd9de5c8b4cd792484a7661dad9fe73a33c260d1aa9d
+SHA512 (rabbit-3.0.0.gem) = c3a1c25807057028017a48de389d2d4260bd75b2d13ec90b9f399388e0ed51bc40c72045a33146d0c9f3cbc60248116760361255c4ad7b693ed60d5ac61cdcf7
+SHA512 (rubygem-rabbit-3.0.0-test-missing-files.tar.gz) = 8d0ba5eac1fcb3b6307299feec0b055eec88414294bc653962d4c9b9d17ab9051eb466dbf27272fdf4b9ecf5512b185023d1c2fe314ddb174798add3d50c5809