diff --git a/Gemfile.lock b/Gemfile.lock
index cabff89..7f9ff1a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,13 +8,15 @@ GEM
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
     coderay (1.1.0)
+    concurrent-ruby (1.1.10)
     diff-lcs (1.2.5)
     foreman (0.78.0)
       thor (~> 0.19.1)
     http_router (0.11.2)
       rack (>= 1.0.0)
       url_mount (~> 0.2.1)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     json (1.8.3)
     mail (2.5.4)
       mime-types (~> 1.16)