diff --git a/rubygem-aruba.spec b/rubygem-aruba.spec
index 9a4cd91..1e21dbe 100644
--- a/rubygem-aruba.spec
+++ b/rubygem-aruba.spec
@@ -3,8 +3,8 @@
 
 Summary:    CLI Steps for Cucumber, hand-crafted for you in Aruba
 Name:       rubygem-%{gem_name}
-Version:    2.3.3
-Release:    2%{?dist}
+Version:    2.4.0
+Release:    1%{?dist}
 
 # SPDX confirmed
 # templates/, jquery.js existed on 0.14.14, no longer included in 2.0 and above
@@ -19,6 +19,9 @@ Patch1:         rubygem-aruba-2.0.0-make-bundler-optional.patch
 # https://github.com/cucumber/aruba/commit/bd2aea600f7e989e4da734c3e823c3ce12ce629b
 # We still use diff-lcs 1.5, revert the above patch for now
 Patch2:         rubygem-aruba-2.3.1-diff-lcs-1_6-change.patch
+# And for aruba 2.4.0: we still use (old) diff-lcs 1.5 and
+# some diff output still needs adjusting
+Patch3:         rubygem-aruba-2.4.0-diff-lcs-change.patch
 
 
 BuildRequires:  ruby(release)
@@ -63,6 +66,7 @@ ln -sf ../lib
 popd
 %patch -P1 -p1
 %patch -P2 -p1 -R
+%patch -P3 -p1 -R
 
 mv ../%{gem_name}-%{version}.gemspec .
 
@@ -164,6 +168,10 @@ popd # from .%%{gem_instdir}
 %doc    %{gem_instdir}/CHANGELOG.md
 
 %changelog
+* Wed May 06 2026 Mamoru TASAKA <mtasaka@fedoraproject.org> - 2.4.0-1
+- 2.4.0
+- Some diff-lcs related diffs between 1.5.0 and 1.6.2 are reverted
+
 * Sat Jan 17 2026 Fedora Release Engineering <releng@fedoraproject.org> - 2.3.3-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_44_Mass_Rebuild
 
diff --git a/sources b/sources
index 01de0ee..2906ef4 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (aruba-2.3.3.gem) = 4892651a703d0b2badf15a7f45e461ab1478e53d290fc39e7b0a3fa2a4c4830754bdcabddb38ba3e161bd34071da85aad4f56ccaea5ff8b37a5d74ae1e7ca8c2
-SHA512 (rubygem-aruba-2.3.3-testsuite.tar.gz) = a2aa74d9c920dbc3b9709358f5e219886e54f92b85b34de15bd9614308dccd48a3f97bed2f286e8e4dc520259e63063d167a74d72ed70a0635cb8c7348ccb175
+SHA512 (aruba-2.4.0.gem) = 58ef7ec32c840a22fc6e11be48a7ea370afe4a8d00bc1e8746db74d15a3647e8e5d767980ff82bbb40b9f6d27282b73abc74b80a83f668d7b8f077efe20cc4ce
+SHA512 (rubygem-aruba-2.4.0-testsuite.tar.gz) = da519a099723cf215d2660cd50af11b41c79e37977e3dc0d962d75fce3b5d75023e9fa0c9ded3b461a794c13510f67a29d53b99550b40b969a82e9cdfa040632