diff --git a/Gemfile.lock b/Gemfile.lock
index 35df608..c9d5722 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.7.0)
+    addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
     concurrent-ruby (1.1.6)
@@ -31,6 +31,8 @@ GEM
       terminal-table (~> 1.8)
     jekyll-sass-converter (2.1.0)
       sassc (> 2.0.1, < 3.0)
+    jekyll-seo-tag (2.7.1)
+      jekyll (>= 3.8, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
     kramdown (2.2.1)
@@ -44,7 +46,7 @@ GEM
     mercenary (0.4.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.5)
+    public_suffix (4.0.6)
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
@@ -62,6 +64,7 @@ PLATFORMS
 
 DEPENDENCIES
   jekyll (~> 4.1)
+  jekyll-seo-tag
 
 BUNDLED WITH
    2.1.4