diff --git a/Gemfile.lock b/Gemfile.lock
index 918e5c7..87b3117 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,7 +4,7 @@ GEM
     addressable (2.6.0)
       public_suffix (>= 2.0.2, < 4.0)
     colorator (1.1.0)
-    concurrent-ruby (1.1.4)
+    concurrent-ruby (1.1.5)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
@@ -27,19 +27,15 @@ GEM
       pathutil (~> 0.9)
       rouge (>= 1.7, < 4)
       safe_yaml (~> 1.0)
-    jekyll-feed (0.11.0)
-      jekyll (~> 3.3)
     jekyll-paginate (1.1.0)
     jekyll-sass-converter (1.5.2)
       sass (~> 3.4)
-    jekyll-seo-tag (2.5.0)
-      jekyll (~> 3.3)
-    jekyll-sitemap (1.2.0)
-      jekyll (~> 3.3)
-    jekyll-watch (2.1.2)
+    jekyll-sitemap (1.3.1)
+      jekyll (>= 3.7, < 5.0)
+    jekyll-watch (2.2.1)
       listen (~> 3.0)
     kramdown (1.17.0)
-    liquid (4.0.2)
+    liquid (4.0.3)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -65,9 +61,7 @@ PLATFORMS
 
 DEPENDENCIES
   jekyll
-  jekyll-feed
   jekyll-paginate
-  jekyll-seo-tag
   jekyll-sitemap
 
 BUNDLED WITH