1 files changed, 1 insertions, 0 deletions

diff --git a/Gemfile b/Gemfile
index ffe456cae08..d3689e4a211 100644
--- a/Gemfile
+++ b/Gemfile
@@ -159,6 +159,7 @@ gem 'icalendar'
 
 # Diffs
 gem 'diffy', '~> 3.1.0'
+gem 'diff_match_patch', '~> 0.1.0'
 
 # Application server
 gem 'rack', '~> 2.0.7'