diff --git a/Gemfile.lock b/Gemfile.lock
index 336e821..6c59375 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,23 +7,23 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    activemodel (4.2.7.1)
-      activesupport (= 4.2.7.1)
+    activemodel (4.2.11.3)
+      activesupport (= 4.2.11.3)
       builder (~> 3.1)
-    activerecord (4.2.7.1)
-      activemodel (= 4.2.7.1)
-      activesupport (= 4.2.7.1)
+    activerecord (4.2.11.3)
+      activemodel (= 4.2.11.3)
+      activesupport (= 4.2.11.3)
       arel (~> 6.0)
-    activesupport (4.2.7.1)
+    activesupport (4.2.11.3)
       i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    arel (6.0.3)
-    builder (3.2.2)
+    arel (6.0.4)
+    builder (3.2.4)
     byebug (9.0.6)
     coderay (1.1.1)
+    concurrent-ruby (1.1.6)
     coveralls (0.8.16)
       json (>= 1.8, < 3)
       simplecov (~> 0.12.0)
@@ -31,10 +31,11 @@ GEM
       thor (~> 0.19.1)
       tins (>= 1.6.0, < 2)
     docile (1.1.5)
-    i18n (0.7.0)
-    json (1.8.3)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
+    json (2.3.1)
     method_source (0.8.2)
-    minitest (5.10.1)
+    minitest (5.12.0)
     pry (0.10.4)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
@@ -53,9 +54,9 @@ GEM
     term-ansicolor (1.3.2)
       tins (~> 1.0)
     thor (0.19.4)
-    thread_safe (0.3.5)
+    thread_safe (0.3.6)
     tins (1.13.0)
-    tzinfo (1.2.2)
+    tzinfo (1.2.7)
       thread_safe (~> 0.1)
 
 PLATFORMS