diff --git a/Gemfile.lock b/Gemfile.lock
index 5f5c844..88b8fad 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -61,6 +61,7 @@ GEM
       execjs
     coffee-script-source (1.9.1)
     columnize (0.9.0)
+    concurrent-ruby (1.1.9)
     daemons (1.2.2)
     debug_inspector (0.0.2)
     devise (3.4.1)
@@ -82,7 +83,8 @@ GEM
     highline (1.6.21)
     hike (1.2.3)
     hodel_3000_compliant_logger (0.1.1)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jbuilder (2.2.12)
       activesupport (>= 3.0.0, < 5)
       multi_json (~> 1.2)