diff --git a/.gitignore b/.gitignore
index bba4db0..9e61e04 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 /nio4r-2.0.0.gem
 /nio4r-2.1.0.gem
 /nio4r-2.2.0.gem
+/nio4r-2.3.1.gem
diff --git a/rubygem-nio4r.spec b/rubygem-nio4r.spec
index 33424f7..c209c10 100644
--- a/rubygem-nio4r.spec
+++ b/rubygem-nio4r.spec
@@ -4,8 +4,8 @@
 %global libev_version 4.24
 
 Name: rubygem-%{gem_name}
-Version: 2.2.0
-Release: 4%{?dist}
+Version: 2.3.1
+Release: 1%{?dist}
 Summary: New IO for Ruby
 # The entire source code is MIT, bundled libev is BSD or GPLv2+
 License: MIT and (BSD or GPLv2+)
@@ -43,7 +43,7 @@ BuildArch: noarch
 Documentation for %{name}.
 
 %prep
-%setup -q -n  %{gem_name}-%{version}
+%setup -q -n %{gem_name}-%{version}
 
 %build
 # Create the gem as gem install only works on a gem file
@@ -69,7 +69,6 @@ cp -a .%{gem_extdir_mri}/{gem.build_complete,*.so} %{buildroot}%{gem_extdir_mri}
 # Prevent dangling symlink in -debuginfo (rhbz#878863).
 rm -rf %{buildroot}%{gem_instdir}/ext/
 
-# Run the test suite
 %check
 pushd .%{gem_instdir}
 # Check libev version correctness.
@@ -122,6 +121,9 @@ popd
 %{gem_instdir}/spec
 
 %changelog
+* Mon Jun 11 2018 Jun Aruga <jaruga@redhat.com> - 2.3.1-1
+- Update to nio4r 2.3.1.
+
 * Fri Feb 09 2018 Fedora Release Engineering <releng@fedoraproject.org> - 2.2.0-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
 
diff --git a/sources b/sources
index ca74b02..868b3a0 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (nio4r-2.2.0.gem) = 9a9acaede13da07894edb7012f593bd2132296f2130cc2529cfbbad421aaa1e7b144403c9812e6ac8429cf6bb9e8c7e746acd86f2061dedf4cc14fb10fdaa7fe
+SHA512 (nio4r-2.3.1.gem) = 6e8fbc744f17b42a0a5c9f8f6db79ce3c9c0dbf6cb047f0b48faab813effc9f5dabe7405475a755bea9f0eb49037f6f26bdc6b8ff3fc7ab3bca61fc238e4eb6d