diff --git a/Gemfile.lock b/Gemfile.lock
index ba0d6ee..691d9d7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -343,7 +343,7 @@ GEM
     sorted_set (1.0.3)
       rbtree
       set (~> 1.0)
-    spring (4.1.3)
+    spring (4.2.1)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)