diff --git a/Gemfile.lock b/Gemfile.lock
index d0199de..d0594c4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -76,7 +76,7 @@ GEM
     domain_name (0.5.24)
       unf (>= 0.0.5, < 1.0.0)
     erubis (2.7.0)
-    execjs (2.5.2)
+    execjs (2.7.0)
     foundation-rails (5.5.2.1)
       railties (>= 3.1.0)
       sass (>= 3.3.0, < 3.5)
@@ -96,7 +96,7 @@ GEM
       rails-dom-testing (~> 1.0)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (1.8.3)
+    json (1.8.6)
     loofah (2.0.2)
       nokogiri (>= 1.5.9)
     mail (2.6.3)
@@ -204,9 +204,8 @@ GEM
       coffee-rails
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
-    uglifier (2.7.1)
-      execjs (>= 0.3.0)
-      json (>= 1.8.0)
+    uglifier (4.1.20)
+      execjs (>= 0.3.0, < 3)
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.1)