diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5a5133e..21d53a3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [ '2.5', '2.6', '2.7', '3.0', '3.1', '3.2', '3.3', '3.4' ]
+        ruby: [ '2.5', '2.6', '2.7', '3.0', '3.1', '3.2', '3.3', '3.4', '4.0' ]
     steps:
       - uses: actions/checkout@v4
       - name: Set up Ruby ${{ matrix.ruby }}
diff --git a/forked.gemspec b/forked.gemspec
index 4f47713..5fa2c63 100644
--- a/forked.gemspec
+++ b/forked.gemspec
@@ -16,6 +16,8 @@ Gem::Specification.new do |spec|
   spec.files = Dir["lib/**/*.rb"] + Dir["*.txt"] + Dir["*.md"]
   spec.require_paths = ['lib']
 
+  spec.add_dependency 'logger', '~> 1'
+
   spec.bindir        = "exe"
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
diff --git a/lib/forked/version.rb b/lib/forked/version.rb
index 19323f6..a5be8d1 100644
--- a/lib/forked/version.rb
+++ b/lib/forked/version.rb
@@ -1,3 +1,3 @@
 module Forked
-  VERSION = "0.1.5"
+  VERSION = "0.1.6"
 end