diff --git a/Gemfile b/Gemfile
index 9fc3bfbf..e1158738 100644
--- a/Gemfile
+++ b/Gemfile
@@ -19,3 +19,6 @@ gem 'html-proofer'
 
 # Avoid polling on windows
 gem 'wdm', '>= 0.1.0'
+
+# For local Ruby 3 support; works around https://github.com/github/pages-gem/issues/752
+gem "webrick", "~> 1.7"
diff --git a/Gemfile.lock b/Gemfile.lock
index edca955d..df90f8ce 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -98,6 +98,7 @@ GEM
     tzinfo-data (1.2018.5)
       tzinfo (>= 1.0.0)
     wdm (0.1.1)
+    webrick (1.7.0)
     yell (2.2.2)
 
 PLATFORMS
@@ -118,6 +119,7 @@ DEPENDENCIES
   tzinfo
   tzinfo-data
   wdm (>= 0.1.0)
+  webrick (~> 1.7)
 
 BUNDLED WITH
    2.3.6
diff --git a/Rakefile b/Rakefile
index ef1fd57d..07577d6b 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,3 +1,5 @@
+require 'fileutils'
+
 task :clean do
   sh('rm -rf _site')
 end
@@ -11,6 +13,12 @@ task :dependencies do
     sh('bundle config set --local path "gems"')
   end
   sh('bundle install')
+
+  # Fix pathutil on Ruby 3; works around https://github.com/envygeeks/pathutil/pull/5
+  # as suggested by https://stackoverflow.com/a/73909894/67873
+  pathutil_path = `bundle exec gem which pathutil`.chomp()
+  content = File.read(pathutil_path).gsub(', kwd', ', **kwd')
+  File.write(pathutil_path, content)
 end
 
 task :spelling_dependencies do