diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index 4727023ec0..a42beabd9b 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -20,7 +20,7 @@ GEM
     concurrent-ruby (1.1.9)
     connection_pool (2.2.5)
     did_you_mean (1.6.1)
-    diff-lcs (1.4.4)
+    diff-lcs (1.5.0)
     docile (1.4.0)
     domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)