diff --git a/Gemfile b/Gemfile
old mode 100755
new mode 100644
index 9f624d8..e7cd08d
--- a/Gemfile
+++ b/Gemfile
@@ -1,8 +1,8 @@
 source 'https://rubygems.org'
 
 group :development, :test do
-  gem 'jekyll', '~> 3.7.0'
-  gem 'jekyll-redirect-from', '~> 0.13.0'
-  gem 'jekyll-sitemap', '~> 1.2.0'
-  gem 'jekyll-toc', '~> 0.5.1'
+  gem 'jekyll', '~> 3.7.4'
+  gem 'jekyll-redirect-from', '~> 0.14.0'
+  gem 'jekyll-sitemap', '~> 1.3.0'
+  gem 'jekyll-toc', '~> 0.6.0'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
old mode 100755
new mode 100644
index 2855b67..0bf5257
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,22 +1,22 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.7)
+      public_suffix (>= 2.0.2, < 7.0)
     colorator (1.1.0)
-    concurrent-ruby (1.0.5)
-    em-websocket (0.5.1)
+    concurrent-ruby (1.3.5)
+    em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
-      http_parser.rb (~> 0.6.0)
-    eventmachine (1.2.5)
-    eventmachine (1.2.5-x64-mingw32)
-    ffi (1.9.23)
-    ffi (1.9.23-x64-mingw32)
+      http_parser.rb (~> 0)
+    eventmachine (1.2.7)
+    eventmachine (1.2.7-x64-mingw32)
+    ffi (1.17.2)
+    ffi (1.17.2-x64-mingw32)
     forwardable-extended (2.6.0)
-    http_parser.rb (0.6.0)
+    http_parser.rb (0.8.0)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    jekyll (3.7.3)
+    jekyll (3.7.4)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
@@ -29,38 +29,38 @@ GEM
       pathutil (~> 0.9)
       rouge (>= 1.7, < 4)
       safe_yaml (~> 1.0)
-    jekyll-redirect-from (0.13.0)
+    jekyll-redirect-from (0.14.0)
       jekyll (~> 3.3)
     jekyll-sass-converter (1.5.2)
       sass (~> 3.4)
-    jekyll-sitemap (1.2.0)
-      jekyll (~> 3.3)
-    jekyll-toc (0.5.2)
-      nokogiri (~> 1.6)
-    jekyll-watch (2.0.0)
+    jekyll-sitemap (1.3.1)
+      jekyll (>= 3.7, < 5.0)
+    jekyll-toc (0.6.0)
+      nokogiri (~> 1.7)
+    jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (1.16.2)
-    liquid (4.0.0)
-    listen (3.1.5)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
-      ruby_dep (~> 1.2)
+    kramdown (1.17.0)
+    liquid (4.0.4)
+    listen (3.9.0)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
-    mini_portile2 (2.3.0)
-    nokogiri (1.8.2)
-      mini_portile2 (~> 2.3.0)
-    nokogiri (1.8.2-x64-mingw32)
-      mini_portile2 (~> 2.3.0)
-    pathutil (0.16.1)
+    mini_portile2 (2.8.9)
+    nokogiri (1.15.7)
+      mini_portile2 (~> 2.8.2)
+      racc (~> 1.4)
+    nokogiri (1.15.7-x64-mingw32)
+      racc (~> 1.4)
+    pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.2)
-    rb-fsevent (0.10.3)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
-    rouge (3.1.1)
-    ruby_dep (1.5.0)
-    safe_yaml (1.0.4)
-    sass (3.5.5)
+    public_suffix (5.1.1)
+    racc (1.8.1)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.11.1)
+      ffi (~> 1.0)
+    rouge (3.30.0)
+    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)
@@ -71,10 +71,10 @@ PLATFORMS
   x64-mingw32
 
 DEPENDENCIES
-  jekyll (~> 3.7.0)
-  jekyll-redirect-from (~> 0.13.0)
-  jekyll-sitemap (~> 1.2.0)
-  jekyll-toc (~> 0.5.1)
+  jekyll (~> 3.7.4)
+  jekyll-redirect-from (~> 0.14.0)
+  jekyll-sitemap (~> 1.3.0)
+  jekyll-toc (~> 0.6.0)
 
 BUNDLED WITH
-   1.16.1
+   1.17.3