diff --git a/Gemfile b/Gemfile
old mode 100755
new mode 100644
index 9f624d8..b692172
--- a/Gemfile
+++ b/Gemfile
@@ -4,5 +4,5 @@ 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-toc', '~> 0.6.0'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
old mode 100755
new mode 100644
index 2855b67..82f3aa7
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -35,8 +35,8 @@ GEM
       sass (~> 3.4)
     jekyll-sitemap (1.2.0)
       jekyll (~> 3.3)
-    jekyll-toc (0.5.2)
-      nokogiri (~> 1.6)
+    jekyll-toc (0.6.0)
+      nokogiri (~> 1.7)
     jekyll-watch (2.0.0)
       listen (~> 3.0)
     kramdown (1.16.2)
@@ -46,14 +46,16 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
     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)
+    mini_portile2 (2.8.5)
+    nokogiri (1.15.4)
+      mini_portile2 (~> 2.8.2)
+      racc (~> 1.4)
+    nokogiri (1.15.4-x64-mingw32)
+      racc (~> 1.4)
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
     public_suffix (3.0.2)
+    racc (1.7.3)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
@@ -74,7 +76,7 @@ DEPENDENCIES
   jekyll (~> 3.7.0)
   jekyll-redirect-from (~> 0.13.0)
   jekyll-sitemap (~> 1.2.0)
-  jekyll-toc (~> 0.5.1)
+  jekyll-toc (~> 0.6.0)
 
 BUNDLED WITH
-   1.16.1
+   1.17.3