diff --git a/Gemfile.lock b/Gemfile.lock
index 43574b9..4218207 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -904,7 +904,7 @@ GEM
       activemodel (>= 5.0)
       bindex (>= 0.4.0)
       railties (>= 5.0)
-    webpacker (3.5.5)
+    webpacker (4.0.7)
       activesupport (>= 4.2)
       rack-proxy (>= 0.6.1)
       railties (>= 4.2)