diff --git a/Gemfile.lock b/Gemfile.lock
index 423f2ae..837e8fe 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ GEM
       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 (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
@@ -16,12 +16,15 @@ GEM
     commonmarker (0.17.7.1)
       ruby-enum (~> 0.5)
     concurrent-ruby (1.0.5)
-    ethon (0.11.0)
-      ffi (>= 1.3.0)
+    ethon (0.15.0)
+      ffi (>= 1.15.0)
     execjs (2.7.0)
-    faraday (0.13.1)
-      multipart-post (>= 1.2, < 3)
-    ffi (1.12.1)
+    faraday (2.6.0)
+      faraday-net_http (>= 2.0, < 3.1)
+      ruby2_keywords (>= 0.0.4)
+    faraday-net_http (3.0.0)
+    ffi (1.15.5)
+    ffi (1.15.5-x64-mingw-ucrt)
     forwardable-extended (2.6.0)
     gemoji (3.0.0)
     github-pages (172)
@@ -194,31 +197,32 @@ GEM
     minima (2.1.1)
       jekyll (~> 3.3)
     minitest (5.10.3)
-    multipart-post (2.0.0)
-    net-dns (0.8.0)
+    net-dns (0.9.0)
     nokogiri (1.10.7)
       mini_portile2 (~> 2.4.0)
-    octokit (4.7.0)
-      sawyer (~> 0.8.0, >= 0.5.3)
-    pathutil (0.16.1)
+    octokit (4.25.1)
+      faraday (>= 1, < 3)
+      sawyer (~> 0.9)
+    pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (2.0.5)
-    rb-fsevent (0.10.2)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
     rouge (2.2.1)
     ruby-enum (0.7.1)
       i18n
+    ruby2_keywords (0.0.5)
     rubyzip (2.0.0)
-    safe_yaml (1.0.4)
-    sass (3.5.4)
+    safe_yaml (1.0.5)
+    sass (3.7.4)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    sawyer (0.8.1)
-      addressable (>= 2.3.5, < 2.6)
-      faraday (~> 0.8, < 1.0)
+    sawyer (0.9.2)
+      addressable (>= 2.3.5)
+      faraday (>= 0.17.3, < 3)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     thread_safe (0.3.6)