diff --git a/Gemfile.lock b/Gemfile.lock
index 9ed5d81..ece479c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,7 +13,7 @@ GEM
     afm (0.2.2)
     ast (2.4.2)
     childprocess (5.0.0)
-    diff-lcs (1.5.0)
+    diff-lcs (1.5.1)
     docile (1.4.0)
     hashery (2.1.2)
     image_size (3.4.0)