diff --git a/Gemfile.lock b/Gemfile.lock
index f336f57..0649f17 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     colorator (1.1.0)
     concurrent-ruby (1.1.4)
     em-websocket (0.5.1)
@@ -31,13 +31,8 @@ GEM
       jekyll (~> 3.3)
     jekyll-sass-converter (1.5.2)
       sass (~> 3.4)
-    jekyll-seo-tag (2.5.0)
-      jekyll (~> 3.3)
     jekyll-watch (2.1.2)
       listen (~> 3.0)
-    just-the-docs (0.2.3)
-      jekyll (~> 3.8.5)
-      rake (~> 12.3.1)
     kramdown (1.17.0)
     liquid (4.0.1)
     listen (3.1.5)
@@ -45,14 +40,9 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
     mercenary (0.3.6)
-    minima (2.5.0)
-      jekyll (~> 3.5)
-      jekyll-feed (~> 0.9)
-      jekyll-seo-tag (~> 2.1)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.3)
-    rake (12.3.2)
+    public_suffix (5.0.0)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
       ffi (~> 1.0)
@@ -71,8 +61,6 @@ PLATFORMS
 DEPENDENCIES
   jekyll (~> 3.8.5)
   jekyll-feed (~> 0.6)
-  just-the-docs
-  minima (~> 2.0)
   tzinfo-data
 
 BUNDLED WITH