diff --git a/Gemfile.lock b/Gemfile.lock
index e9dec95..802e8bd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -37,10 +37,12 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
+    concurrent-ruby (1.1.10)
     erubis (2.7.0)
     execjs (2.7.0)
     hike (1.2.3)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     journey (1.0.4)
     jquery-rails (3.1.4)
       railties (>= 3.0, < 5.0)
@@ -52,9 +54,11 @@ GEM
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     mime-types (1.25.1)
+    minitest (5.16.0)
     multi_json (1.12.1)
     pg (0.19.0)
     polyglot (0.3.5)
+    power_assert (2.0.1)
     rack (1.4.7)
     rack-cache (1.6.1)
       rack (>= 0.4)
@@ -89,6 +93,8 @@ GEM
       hike (~> 1.2)
       rack (~> 1.0)
       tilt (~> 1.1, != 1.3.0)
+    test-unit (3.5.3)
+      power_assert
     therubyracer (0.12.3)
       libv8 (~> 3.16.14.15)
       ref
@@ -108,9 +114,11 @@ DEPENDENCIES
   coffee-rails (~> 3.2.1)
   jquery-rails
   json (~> 2.0.0)
+  minitest
   pg
   rails (= 3.2.6)
   sass-rails (~> 3.2.3)
+  test-unit
   therubyracer
   uglifier (>= 1.0.3)