diff --git a/Gemfile.lock b/Gemfile.lock
index fde37e729..38788ad26 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,15 +1,9 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.2.4.3)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
     addressable (2.5.2)
       public_suffix (>= 2.0.2, < 4.0)
     colorator (1.1.0)
-    colorize (0.8.1)
     concurrent-ruby (1.1.6)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
@@ -19,13 +13,12 @@ GEM
     eventmachine (1.2.5)
     ffi (1.12.2)
     forwardable-extended (2.6.0)
-    html-proofer (3.8.0)
-      activesupport (>= 4.2, < 6.0)
+    html-proofer (3.19.1)
       addressable (~> 2.3)
-      colorize (~> 0.8)
-      mercenary (~> 0.3.2)
-      nokogiri (~> 1.8.1)
+      mercenary (~> 0.3)
+      nokogumbo (~> 2.0)
       parallel (~> 1.3)
+      rainbow (~> 3.0)
       typhoeus (~> 1.3)
       yell (~> 2.0)
     http_parser.rb (0.6.0)
@@ -61,14 +54,16 @@ GEM
       ruby_dep (~> 1.2)
     mercenary (0.3.6)
     mini_portile2 (2.4.0)
-    minitest (5.14.1)
-    nokogiri (1.10.9)
+    nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
+    nokogumbo (2.0.5)
+      nokogiri (~> 1.8, >= 1.8.4)
     parallel (1.12.1)
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
-    pdfkit (0.8.2)
+    pdfkit (0.8.7.2)
     public_suffix (3.0.2)
+    rainbow (3.1.1)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
@@ -80,11 +75,8 @@ GEM
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    thread_safe (0.3.6)
     typhoeus (1.3.0)
       ethon (>= 0.9.0)
-    tzinfo (1.2.7)
-      thread_safe (~> 0.1)
     wkhtmltopdf-binary-edge (0.12.4.0)
     yell (2.0.7)