diff --git a/Gemfile.lock b/Gemfile.lock
index 91732a6..2b95e4f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -9,8 +9,8 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
     concurrent-ruby (1.0.5)
     em-websocket (0.5.1)
@@ -40,8 +40,6 @@ GEM
       sass (~> 3.4)
     jekyll-seo-tag (2.4.0)
       jekyll (~> 3.3)
-    jekyll-toc (0.6.0)
-      nokogiri (~> 1.7)
     jekyll-watch (2.0.0)
       listen (~> 3.0)
     kramdown (1.16.2)
@@ -51,12 +49,9 @@ 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)
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.2)
+    public_suffix (3.1.1)
     rake (10.5.0)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
@@ -75,7 +70,6 @@ PLATFORMS
 
 DEPENDENCIES
   bundler (~> 1.12)
-  jekyll-toc
   rake (~> 10.0)
   type-on-strap!