diff --git a/Gemfile.lock b/Gemfile.lock
index edcbf6b..0f579bd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -33,8 +33,6 @@ GEM
       terminal-table (~> 1.8)
     jekyll-feed (0.13.0)
       jekyll (>= 3.7, < 5.0)
-    jekyll-redirect-from (0.16.0)
-      jekyll (>= 3.3, < 5.0)
     jekyll-sass-converter (2.1.0)
       sassc (> 2.0.1, < 3.0)
     jekyll-seo-tag (2.6.1)
@@ -60,13 +58,15 @@ GEM
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.4)
+    rexml (3.3.3)
+      strscan
     rouge (3.19.0)
     safe_yaml (1.0.5)
     sassc (2.3.0)
       ffi (~> 1.9)
     sassc (2.3.0-x64-mingw32)
       ffi (~> 1.9)
+    strscan (3.1.0)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     thread_safe (0.3.6)
@@ -84,7 +84,6 @@ PLATFORMS
 DEPENDENCIES
   jekyll (~> 4.0.1)
   jekyll-feed (~> 0.12)
-  jekyll-redirect-from
   minima (~> 2.5)
   tzinfo (~> 1.2)
   tzinfo-data