diff --git a/Gemfile.lock b/Gemfile.lock
index 9fcbab51..d0dcba64 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -30,7 +30,7 @@ GEM
     connection_pool (2.4.1)
     crack (0.4.5)
       rexml
-    diff-lcs (1.5.0)
+    diff-lcs (1.5.1)
     docile (1.4.0)
     drb (2.2.0)
       ruby2_keywords