diff --git a/Gemfile.lock b/Gemfile.lock
index b35e0f5..3cba962 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,12 +13,14 @@ GEM
       jmespath (~> 1.0)
     aws-sdk-resources (2.2.6)
       aws-sdk-core (= 2.2.6)
+    concurrent-ruby (1.1.10)
     diff-lcs (1.2.5)
     dotenv (2.0.2)
     haml (5.1.2)
       temple (>= 0.8.0)
       tilt
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jmespath (1.1.3)
     json (1.8.6)
     minitest (5.8.3)