diff --git a/Gemfile.lock b/Gemfile.lock
index 1a70345..ba6d082 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,30 +1,21 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (4.2.7)
-      i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
-      minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
-      tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
-    colored (1.2)
-    ethon (0.10.1)
-      ffi (>= 1.3.0)
-    ffi (1.9.23)
+    ethon (0.14.0)
+      ffi (>= 1.15.0)
+    ffi (1.15.3)
     forwardable-extended (2.6.0)
-    html-proofer (3.7.2)
-      activesupport (>= 4.2, < 6.0)
+    html-proofer (3.19.2)
       addressable (~> 2.3)
-      colored (~> 1.2)
-      mercenary (~> 0.3.2)
-      nokogiri (~> 1.7)
+      mercenary (~> 0.3)
+      nokogumbo (~> 2.0)
       parallel (~> 1.3)
-      typhoeus (~> 0.7)
+      rainbow (~> 3.0)
+      typhoeus (~> 1.3)
       yell (~> 2.0)
-    i18n (0.8.1)
     jekyll (3.4.1)
       addressable (~> 2.4)
       colorator (~> 1.0)
@@ -42,7 +33,6 @@ GEM
       sass (~> 3.4)
     jekyll-watch (1.5.1)
       listen (~> 3.0)
-    json (1.8.6)
     kramdown (1.16.2)
     liquid (3.0.6)
     listen (3.1.5)
@@ -50,16 +40,20 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
     mercenary (0.3.6)
-    mini_portile2 (2.3.0)
+    mini_portile2 (2.5.3)
     minima (2.1.1)
       jekyll (~> 3.3)
-    minitest (5.10.1)
-    nokogiri (1.8.2)
-      mini_portile2 (~> 2.3.0)
-    parallel (1.12.0)
+    nokogiri (1.11.7)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
+    nokogumbo (2.0.5)
+      nokogiri (~> 1.8, >= 1.8.4)
+    parallel (1.20.1)
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.2)
+    public_suffix (4.0.6)
+    racc (1.5.2)
+    rainbow (3.0.0)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
@@ -71,12 +65,9 @@ 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 (0.8.0)
-      ethon (>= 0.8.0)
-    tzinfo (1.2.2)
-      thread_safe (~> 0.1)
-    yell (2.0.7)
+    typhoeus (1.4.0)
+      ethon (>= 0.9.0)
+    yell (2.2.2)
 
 PLATFORMS
   ruby