diff --git a/Gemfile.lock b/Gemfile.lock
index d747afb..5021b89 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -83,7 +83,7 @@ GEM
     childprocess (4.1.0)
     concurrent-ruby (1.1.9)
     crass (1.0.6)
-    debug (1.3.4)
+    debug (1.4.0)
       irb (>= 1.3.6)
       reline (>= 0.2.7)
     diff-lcs (1.4.4)