diff --git a/Gemfile b/Gemfile
index 089ae77..3f52b96 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,7 +12,7 @@ gem "jekyll", "~> 3.8.5"
 
 # This is the default theme for new Jekyll sites. You may change this to anything you like.
 gem "minima", "~> 2.0"
-gem "just-the-docs"
+gem "just-the-docs", ">= 0.2.3"
 
 # If you want to use GitHub Pages, remove the "gem "jekyll"" above and
 # uncomment the line below. To upgrade, run `bundle update github-pages`.
diff --git a/Gemfile.lock b/Gemfile.lock
index e25c254..5488f53 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,22 +1,22 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.6)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
     eventmachine (1.2.7)
     eventmachine (1.2.7-x64-mingw32)
-    ffi (1.10.0)
-    ffi (1.10.0-x64-mingw32)
+    ffi (1.12.2)
+    ffi (1.12.2-x64-mingw32)
     forwardable-extended (2.6.0)
     http_parser.rb (0.6.0)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    jekyll (3.8.5)
+    jekyll (3.8.6)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
@@ -35,17 +35,17 @@ GEM
       sass (~> 3.4)
     jekyll-seo-tag (2.5.0)
       jekyll (~> 3.3)
-    jekyll-watch (2.1.2)
+    jekyll-watch (2.2.1)
       listen (~> 3.0)
-    just-the-docs (0.2.3)
+    just-the-docs (0.2.7)
       jekyll (~> 3.8.5)
+      jekyll-seo-tag (~> 2.0)
       rake (~> 12.3.1)
     kramdown (1.17.0)
-    liquid (4.0.2)
-    listen (3.1.5)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
-      ruby_dep (~> 1.2)
+    liquid (4.0.3)
+    listen (3.2.1)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
     minima (2.5.0)
       jekyll (~> 3.5)
@@ -53,15 +53,14 @@ GEM
       jekyll-seo-tag (~> 2.1)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.3)
-    rake (12.3.2)
+    public_suffix (4.0.3)
+    rake (12.3.3)
     rb-fsevent (0.10.3)
-    rb-inotify (0.10.0)
+    rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rouge (3.3.0)
-    ruby_dep (1.5.0)
+    rouge (3.16.0)
     safe_yaml (1.0.5)
-    sass (3.7.3)
+    sass (3.7.4)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -78,9 +77,9 @@ PLATFORMS
 DEPENDENCIES
   jekyll (~> 3.8.5)
   jekyll-feed (~> 0.6)
-  just-the-docs
+  just-the-docs (>= 0.2.3)
   minima (~> 2.0)
   tzinfo-data
 
 BUNDLED WITH
-   2.0.1
+   1.17.3