diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 505263ce..8abd0efb 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [ '2.5', '2.6', '2.7', '3.0', 'ruby-head', 'jruby-9.2', 'jruby-head' ]
+        ruby: [ '2.5', '2.6', '2.7', '3.0', '3.1', 'ruby-head', 'jruby-9.2', 'jruby-9.3', 'jruby-head' ]
     steps:
     - uses: actions/checkout@v3
     - uses: ruby/setup-ruby@v1
@@ -30,7 +30,7 @@ jobs:
     - uses: actions/checkout@v3
     - uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.7.1
+        ruby-version: 3.1.3
     - name: Test performance and accuracy
       run: |
         gem install bundler
diff --git a/evaluation/dictionary_generator.rb b/evaluation/dictionary_generator.rb
index 150765fd..d7bd79f8 100644
--- a/evaluation/dictionary_generator.rb
+++ b/evaluation/dictionary_generator.rb
@@ -14,7 +14,7 @@
 
   puts ("downloading page %2d: " % num) + url
 
-  body   = open(url).read
+  body   = URI.open(url).read
   json   = JSON.load(body)
   count  = json["query"]["allpages"].size
   apfrom = CGI.escape(json["query"]["allpages"].last['title']) if count > 0