diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 9133a6b..341f782 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -18,7 +18,7 @@ GEM
     execjs (2.7.0)
     faraday (0.13.1)
       multipart-post (>= 1.2, < 3)
-    ffi (1.9.18)
+    ffi (1.12.2)
     forwardable-extended (2.6.0)
     gemoji (3.0.0)
     github-pages (157)
@@ -212,7 +212,6 @@ PLATFORMS
 
 DEPENDENCIES
   github-pages
-  jekyll-feed (~> 0.6)
   jekyll-gist
   jekyll-sitemap
   tzinfo-data