diff --git a/Gemfile.lock b/Gemfile.lock
index 0f97b4a02d..376ecff845 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -801,7 +801,8 @@ GEM
       spring (>= 0.9.1)
     spring-commands-rubocop (0.4.0)
       spring (>= 1.0)
-    sprockets (3.7.2)
+    sprockets (3.7.5)
+      base64
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (3.4.2)