diff --git a/hw4_grader_stuff/hw4_rottenpotatoes/Gemfile.lock b/hw4_grader_stuff/hw4_rottenpotatoes/Gemfile.lock
index 0d5a5ca5..f88ae904 100644
--- a/hw4_grader_stuff/hw4_rottenpotatoes/Gemfile.lock
+++ b/hw4_grader_stuff/hw4_rottenpotatoes/Gemfile.lock
@@ -60,6 +60,7 @@ GEM
       execjs
     coffee-script-source (1.9.1.1)
     columnize (0.9.0)
+    concurrent-ruby (1.1.10)
     cucumber (1.3.20)
       builder (>= 2.1.2)
       diff-lcs (>= 1.1.3)
@@ -91,7 +92,8 @@ GEM
       activesupport (>= 4.1.0)
     haml (4.0.7)
       tilt
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jbuilder (2.3.1)
       activesupport (>= 3.0.0, < 5)
       multi_json (~> 1.2)