diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
index 87285c1..dfa05f5 100644
--- a/.github/workflows/cd.yml
+++ b/.github/workflows/cd.yml
@@ -43,7 +43,7 @@
   
         - uses: ruby/setup-ruby@v1
           with:
-            ruby-version-file: .ruby-version
+            ruby-version: '4.0'
 
         - uses: oxidize-rb/actions/cross-gem@v1
           id: cross-gem
diff --git a/rakelib/compile.rake b/rakelib/compile.rake
index ee9efa9..e8a3e11 100644
--- a/rakelib/compile.rake
+++ b/rakelib/compile.rake
@@ -1,6 +1,5 @@
 require 'rb_sys/extensiontask'
 
 RbSys::ExtensionTask.new('code_ownership', GEMSPEC) do |ext|
-  ruby_minor = RUBY_VERSION[/\d+\.\d+/]
-  ext.lib_dir = "lib/code_ownership/#{ruby_minor}"
+  ext.lib_dir = 'lib/code_ownership'
 end