diff --git a/Retention/Gemfile.lock b/Retention/Gemfile.lock
index b974e54..febf9af 100644
--- a/Retention/Gemfile.lock
+++ b/Retention/Gemfile.lock
@@ -1,27 +1,29 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (4.1.4)
+    activesupport (4.1.11)
       i18n (~> 0.6, >= 0.6.9)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
       thread_safe (~> 0.1)
       tzinfo (~> 1.1)
     addressable (2.3.6)
+    concurrent-ruby (1.1.6)
     fast_xs (0.8.0)
-    i18n (0.6.11)
-    json (1.8.1)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
+    json (1.8.6)
     keen (0.8.4)
       addressable (~> 2.3.5)
       multi_json (~> 1.3)
-    minitest (5.4.0)
+    minitest (5.14.1)
     multi_json (1.10.1)
     rubyzip (0.9.9)
     simple_xlsx_writer (0.5.3)
       fast_xs (>= 0.7.3)
       rubyzip (>= 0.9.4)
-    thread_safe (0.3.4)
-    tzinfo (1.2.1)
+    thread_safe (0.3.6)
+    tzinfo (1.2.7)
       thread_safe (~> 0.1)
 
 PLATFORMS