diff --git a/Gemfile.lock b/Gemfile.lock
index 017c831..9235e06 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -63,6 +63,7 @@ GEM
       rack-test (>= 0.5.4)
       xpath (~> 2.0)
     coderay (1.1.0)
+    concurrent-ruby (1.1.10)
     connection_pool (2.2.5)
     erubis (2.7.0)
     ethon (0.15.0)
@@ -77,7 +78,8 @@ GEM
     ffi (1.15.5)
     globalid (0.3.5)
       activesupport (>= 4.1.0)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jquery-rails (4.4.0)
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)