diff --git a/CHANGELOG.md b/CHANGELOG.md
index d8b9ef6b..995b4c94 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 ### Other changes
 - Fixed "Using parts of SuperDiff directly" documentation. [#313](https://github.com/splitwise/super_diff/pull/313)
+- Allow diff-lcs 2. [#317](https://github.com/splitwise/super_diff/pull/317) by [@andrewfader](https://github.com/andrewfader)
 
 ## 0.19.0 - 2026-05-01
 
diff --git a/Gemfile.lock b/Gemfile.lock
index d0dd8284..aa4a75c0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     super_diff (0.19.0)
       attr_extras (>= 6.2.4, < 8)
-      diff-lcs (~> 1.5)
+      diff-lcs (>= 1.5, < 3)
       patience_diff (~> 1.2)
 
 GEM
diff --git a/super_diff.gemspec b/super_diff.gemspec
index 3e34e47b..98c02c7f 100644
--- a/super_diff.gemspec
+++ b/super_diff.gemspec
@@ -28,6 +28,6 @@ Gem::Specification.new do |s|
   s.executables = Dir['exe/**/*'].map { |f| File.basename(f) }
 
   s.add_dependency 'attr_extras', '>= 6.2.4', '< 8'
-  s.add_dependency 'diff-lcs', '~> 1.5'
+  s.add_dependency 'diff-lcs', '>= 1.5', '< 3'
   s.add_dependency 'patience_diff', '~> 1.2'
 end