diff --git a/Gemfile.lock b/Gemfile.lock
index a07dd42..b4cf3b3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -74,13 +74,15 @@ GEM
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
+    rexml (3.3.3)
+      strscan
     rouge (3.26.0)
     ruby-vips (2.0.17)
       ffi (~> 1.9)
     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)
     uglifier (4.2.0)
@@ -90,6 +92,7 @@ GEM
 PLATFORMS
   x86_64-darwin-18
   x86_64-darwin-20
+  x86_64-linux
 
 DEPENDENCIES
   jekyll