diff --git a/Gemfile.lock b/Gemfile.lock
index a168da3c0..c0472fa3c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -15,7 +15,7 @@ GEM
     bigdecimal (3.1.6)
     concurrent-ruby (1.2.3)
     connection_pool (2.4.1)
-    diff-lcs (1.5.0)
+    diff-lcs (1.5.1)
     docile (1.4.0)
     drb (2.2.0)
       ruby2_keywords