diff --git a/rubygem-nio4r.spec b/rubygem-nio4r.spec
index 4bf0798..0733173 100644
--- a/rubygem-nio4r.spec
+++ b/rubygem-nio4r.spec
@@ -1,11 +1,11 @@
 # Generated from nio4r-1.2.1.gem by gem2rpm -*- rpm-spec -*-
 %global gem_name nio4r
 
-%global libev_version 4.24
+%global libev_version 4.25
 
 Name: rubygem-%{gem_name}
-Version: 2.3.1
-Release: 4%{?dist}
+Version: 2.4.0
+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+)
@@ -69,6 +69,7 @@ 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/
 
+
 %check
 pushd .%{gem_instdir}
 # Check libev version correctness.
@@ -80,24 +81,6 @@ EV_VERSION_MINOR=$(grep EV_VERSION_MINOR ext/libev/ev.h | cut -d ' ' -f3)
 sed -i '/require "coveralls"/ s/^/#/' spec/spec_helper.rb
 sed -i '/Coveralls.wear!/ s/^/#/' spec/spec_helper.rb
 
-# Ignore rspec-retry.
-# https://github.com/socketry/nio4r/commit/e718068
-sed -i '/require "rspec\/retry"/ s/^/#/' spec/spec_helper.rb
-sed -i '/config.verbose_retry/ s/^/#/' spec/spec_helper.rb
-sed -i '/config.display_try_failure_messages/ s/^/#/' spec/spec_helper.rb
-sed -i 's/, retry: [0-9]\+//' spec/nio/selectables/tcp_socket_spec.rb
-sed -i 's/, retry: [0-9]\+//' spec/support/selectable_examples.rb
-
-# NIO::Selector is slow at i686 environment.
-sed -i '/TIMEOUT_PRECISION/ s/0.1/0.5/' spec/nio/selector_spec.rb
-sed -i '/^    it "wakes up if signaled to from another thread" do$/,/^    end$/ s/0.1/0.5/' \
-  spec/nio/selector_spec.rb
-
-# Failing due to OpenSSL 1.1.1.
-# https://github.com/socketry/nio4r/issues/194
-sed -i '/"selects readable when the other end closes"/a\
-    skip' spec/support/selectable_examples.rb
-
 # Load nio4r_ext.so.
 rspec -I$(dirs +1)%{gem_extdir_mri} spec
 popd
@@ -118,7 +101,7 @@ popd
 %doc %{gem_instdir}/README.md
 %doc %{gem_instdir}/CHANGES.md
 %{gem_instdir}/logo.png
-%{gem_instdir}/tasks
+%{gem_instdir}/rakelib
 %{gem_instdir}/Guardfile
 %{gem_instdir}/Rakefile
 %{gem_instdir}/examples
@@ -126,6 +109,9 @@ popd
 %{gem_instdir}/spec
 
 %changelog
+* Tue Jul 09 2019 Vít Ondruch <vondruch@redhat.com> - 2.4.0-1
+- Update to nio4r 2.4.0.
+
 * Sat Feb 02 2019 Fedora Release Engineering <releng@fedoraproject.org> - 2.3.1-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild