diff --git a/Gemfile.lock b/Gemfile.lock
index d09be3a..e73b4b3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -63,7 +63,7 @@ GEM
     concurrent-ruby (1.0.5)
     crass (1.0.2)
     erubi (1.7.0)
-    execjs (2.7.0)
+    execjs (2.8.1)
     ffi (1.9.18)
     globalid (0.4.1)
       activesupport (>= 4.2.0)
@@ -162,7 +162,7 @@ GEM
     turbolinks-source (5.0.3)
     tzinfo (1.2.4)
       thread_safe (~> 0.1)
-    uglifier (3.2.0)
+    uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
     web-console (3.5.1)
       actionview (>= 5.0)