diff --git a/Gemfile.lock b/Gemfile.lock
index 712ca3f..2e4e14f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -159,7 +159,6 @@ GEM
     jekyll-optional-front-matter (0.3.2)
       jekyll (>= 3.0, < 5.0)
     jekyll-paginate (1.1.0)
-    jekyll-postcss (0.5.0)
     jekyll-readme-index (0.3.0)
       jekyll (>= 3.0, < 5.0)
     jekyll-redirect-from (0.16.0)
@@ -235,15 +234,15 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
-    mini_portile2 (2.7.1)
+    mini_portile2 (2.8.0)
     minima (2.5.1)
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
     minitest (5.15.0)
     multipart-post (2.1.1)
-    nokogiri (1.13.1)
-      mini_portile2 (~> 2.7.0)
+    nokogiri (1.13.2)
+      mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     octokit (4.22.0)
       faraday (>= 0.9)
@@ -294,7 +293,6 @@ PLATFORMS
 DEPENDENCIES
   github-pages
   html-proofer
-  jekyll-postcss
   nokogiri (>= 1.10.4)
 
 BUNDLED WITH