diff --git a/.gitignore b/.gitignore
index f18726d..5044bfa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,3 +21,5 @@
 /rcairo-1.15.10-test-missing-files.tar.gz
 /cairo-1.15.11.gem
 /rcairo-1.15.11-test-missing-files.tar.gz
+/cairo-1.15.12.gem
+/rcairo-1.15.12-test-missing-files.tar.gz
diff --git a/rubygem-cairo.spec b/rubygem-cairo.spec
index 1b242f0..00f7ca6 100644
--- a/rubygem-cairo.spec
+++ b/rubygem-cairo.spec
@@ -2,7 +2,7 @@
 %global	header_dir	%{ruby_vendorarchdir}
 
 %global	gem_name		cairo
-%global	gemver		1.15.11
+%global	gemver		1.15.12
 #%%global	gem_githash	af3e3fc059
 
 # Upstream GIT http://github.com/rcairo/
@@ -10,7 +10,7 @@
 Summary:	Ruby bindings for cairo
 Name:		rubygem-%{gem_name}
 Version:	%{gemver}
-Release:	4%{?dist}
+Release:	1%{?dist}
 Group:		Development/Languages
 License:	GPLv2 or Ruby
 URL:		http://cairographics.org/rcairo/
@@ -36,6 +36,8 @@ BuildRequires:	ruby(abi) = %{rubyabi}
 BuildRequires:	ruby 
 %endif
 
+BuildRequires:	gcc
+
 BuildRequires:	rubygems-devel
 BuildRequires:	cairo-devel
 BuildRequires:	ruby-devel
@@ -43,6 +45,7 @@ BuildRequires:	ruby-devel
 BuildRequires:	rubygem(test-unit)
 BuildRequires:	rubygem(test-unit-notify)
 BuildRequires:	rubygem(pkg-config)
+BuildRequires:	rubygem(poppler)
 BuildRequires:	rubygem(native-package-installer)
 # Make sure at least one font is available for test/test_context.rb:57
 # `initialize': out of memory (NoMemoryError)
@@ -219,6 +222,9 @@ ruby ./test/run-test.rb
 %{header_dir}/rb_cairo.h
 
 %changelog
+* Fri Mar 16 2018 Mamoru TASAKA <mtasaka@fedoraproject.org> - 1.15.12-1
+- 1.15.12
+
 * Fri Feb 09 2018 Fedora Release Engineering <releng@fedoraproject.org> - 1.15.11-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
 
diff --git a/sources b/sources
index fb9b856..f4f3c7b 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (cairo-1.15.11.gem) = 3c21468511eac323b27a86e1c5188b5444d3bf2de244f4dc35d0ae297cb3f1756ec8333555bb7c4178e9f4ebcfd1600e6fd77fa7fe76055bf633bb2f8c69271c
-SHA512 (rcairo-1.15.11-test-missing-files.tar.gz) = 4a899926d84e4392c889647804ea9e79511544c29fa34137020fac97bd424b5346fbc280142b226f82f9421865b382a881da38ecf0acb45905dc9e230014fbb2
+SHA512 (cairo-1.15.12.gem) = e4b3f7851aa5658fec56090a7c0a54748b04bfa2b6ecab555c5c1228b1ec337401b29bf32d7201efc260adbb56af47a4c400a91034c5562f002b4475b3413745
+SHA512 (rcairo-1.15.12-test-missing-files.tar.gz) = aadde826759dec642835080e8fb094d33127f2675f15aa51f7c2b7f6d32512c72db77c7f8e1549b1209a69eceeafb12d248e230c346b649f65e50b18caaca664