diff --git a/Gemfile.lock b/Gemfile.lock
index cf85095..04e7dfb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -29,8 +29,6 @@ GEM
       rouge (~> 3.0)
       safe_yaml (~> 1.0)
       terminal-table (~> 2.0)
-    jekyll-feed (0.17.0)
-      jekyll (>= 3.7, < 5.0)
     jekyll-sass-converter (2.2.0)
       sassc (> 2.0.1, < 3.0)
     jekyll-watch (2.2.1)
@@ -50,11 +48,13 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
+    rexml (3.3.3)
+      strscan
     rouge (3.30.0)
     safe_yaml (1.0.5)
     sassc (2.4.0)
       ffi (~> 1.9)
+    strscan (3.1.0)
     terminal-table (2.0.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     unicode-display_width (1.8.0)
@@ -62,11 +62,11 @@ GEM
 
 PLATFORMS
   x86_64-darwin-19
+  x86_64-linux
 
 DEPENDENCIES
   http_parser.rb (~> 0.6.0)
   jekyll (~> 4.2.2)
-  jekyll-feed (~> 0.12)
   tzinfo (~> 1.2)
   tzinfo-data
   wdm (~> 0.1.1)