diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e9057ed..d4368dd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['2.7', '3.0', '3.1']
+        ruby-version: ['2.7.6', '3.0', '3.1']
 
     steps:
     - uses: actions/checkout@v3
diff --git a/Gemfile b/Gemfile
index 04f2cda..7915adf 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,5 +10,4 @@ group :test do
   gem 'simplecov', require: false
 end
 
-gem 'zeitwerk'
 gem 'rubocop', github: 'rubocop/rubocop', require: false
\ No newline at end of file
diff --git a/lib/zx/version.rb b/lib/zx/version.rb
index a908dff..4e2dad0 100644
--- a/lib/zx/version.rb
+++ b/lib/zx/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Zx
-  VERSION = '0.0.3'
+  VERSION = '0.0.4'
 end