diff --git a/Gemfile.lock b/Gemfile.lock
index 8b1cc2730d6..37d7436db31 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -119,7 +119,7 @@ GEM
       addressable
     date (3.3.4)
     debug_inspector (1.2.0)
-    diff-lcs (1.5.0)
+    diff-lcs (1.5.1)
     diffy (3.4.2)
     digest (3.1.1)
     discourse-fonts (0.0.9)