diff --git a/Gemfile.lock b/Gemfile.lock
index c9eb56dc55f..d371ab4f103 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -361,8 +361,6 @@ GEM
     nokogiri (1.12.5)
       mini_portile2 (~> 2.6.1)
       racc (~> 1.4)
-    nokogumbo (2.0.4)
-      nokogiri (~> 1.8, >= 1.8.4)
     oauth (0.5.6)
     oauth2 (1.4.4)
       faraday (>= 0.8, < 2.0)
@@ -538,10 +536,9 @@ GEM
     ruby-progressbar (1.11.0)
     ruby2_keywords (0.0.5)
     rubyzip (2.0.0)
-    sanitize (5.2.3)
+    sanitize (6.0.0)
       crass (~> 1.0.2)
-      nokogiri (>= 1.8.0)
-      nokogumbo (~> 2.0)
+      nokogiri (>= 1.12.0)
     sassc (2.4.0)
       ffi (~> 1.9)
     sassc-rails (2.1.2)