diff --git a/Gemfile.lock b/Gemfile.lock
index 378557c..fa181db 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -119,9 +119,9 @@ GEM
       capybara (~> 3.0)
       ferrum (~> 0.14.0)
     date (3.3.4)
-    debug (1.8.0)
-      irb (>= 1.5.0)
-      reline (>= 0.3.1)
+    debug (1.9.1)
+      irb (~> 1.10)
+      reline (>= 0.3.8)
     diff-lcs (1.5.1)
     docile (1.4.0)
     drb (2.2.0)