diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0bc694b0..e220e676 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,7 +28,7 @@ jobs:
     needs: ['rubocop']
     strategy:
       matrix:
-        ruby-version: ['3.0', '3.1', '3.2', '3.3', 'head']
+        ruby-version: ['3.0', '3.1', '3.2', '3.3', '3.4']
     steps:
     - name: Check out branch
       uses: actions/checkout@v4
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e8d01b1e..5600f302 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,7 +7,7 @@
 #### Fixes
 
 * Your contribution here.
-
+* [#388](https://github.com/ruby-grape/grape-entity/pull/388): Drop ruby-head from test matrix to keep builds stable - [@numbata](https://github.com/numbata).
 
 ### ### 1.0.1 (2024-04-10)
 
diff --git a/bench/serializing.rb b/bench/serializing.rb
index 60786543..6ffa256e 100644
--- a/bench/serializing.rb
+++ b/bench/serializing.rb
@@ -35,7 +35,7 @@ class Teacher < Models::Person
     attr_accessor :tenure
 
     def initialize(opts = {})
-      super(opts)
+      super
       @tenure = opts[:tenure]
     end
   end
@@ -44,7 +44,7 @@ class Student < Models::Person
     attr_reader :grade
 
     def initialize(opts = {})
-      super(opts)
+      super
       @grade = opts[:grade]
     end
   end
diff --git a/grape-entity.gemspec b/grape-entity.gemspec
index 66e0f007..3dc3d8ef 100644
--- a/grape-entity.gemspec
+++ b/grape-entity.gemspec
@@ -16,7 +16,7 @@ Gem::Specification.new do |s|
 
   s.required_ruby_version = '>= 3.0'
 
-  s.add_runtime_dependency 'activesupport', '>= 3.0.0'
+  s.add_dependency 'activesupport', '>= 3.0.0'
 
   s.files         = `git ls-files`.split("\n")
   s.test_files    = `git ls-files -- {test,spec}/*`.split("\n")