diff --git a/Gemfile.lock b/Gemfile.lock
index e8be9ce9..927a6d04 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -422,9 +422,9 @@ GEM
     snaky_hash (2.0.1)
       hashie
       version_gem (~> 1.1, >= 1.1.1)
-    sprockets (4.1.1)
+    sprockets (4.2.1)
       concurrent-ruby (~> 1.0)
-      rack (> 1, < 3)
+      rack (>= 2.2.4, < 4)
     sprockets-rails (3.4.2)
       actionpack (>= 5.2)
       activesupport (>= 5.2)