diff --git a/Dockerfile b/Dockerfile
index ca63ecd..7ffa8a0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,6 +3,7 @@ FROM ruby:2.7.8
 # Install dependency packages
 RUN apt-get update && apt-get install -y \
   chromium \
+  chromium-driver \
   curl \
   fonts-liberation \
   libappindicator3-1 \
diff --git a/Gemfile.lock b/Gemfile.lock
index 485377a..223f1f7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,11 +11,7 @@ GEM
   specs:
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
-    apparition (0.6.0)
-      capybara (~> 3.13, < 4)
-      websocket-driver (>= 0.6.5)
     ast (2.4.3)
-    base64 (0.2.0)
     bigdecimal (3.1.9)
     byebug (11.1.3)
     capybara (3.39.2)
@@ -52,6 +48,10 @@ GEM
     matrix (0.4.2)
     method_source (1.1.0)
     mini_mime (1.1.5)
+    mini_portile2 (2.8.9)
+    nokogiri (1.15.7)
+      mini_portile2 (~> 2.8.2)
+      racc (~> 1.4)
     nokogiri (1.15.7-aarch64-linux)
       racc (~> 1.4)
     nokogiri (1.15.7-arm64-darwin)
@@ -102,6 +102,11 @@ GEM
     rubocop-rspec (1.41.0)
       rubocop (>= 0.68.1)
     ruby-progressbar (1.13.0)
+    rubyzip (2.4.1)
+    selenium-webdriver (4.9.0)
+      rexml (~> 3.2, >= 3.2.5)
+      rubyzip (>= 1.2.2, < 3.0)
+      websocket (~> 1.0)
     simplecov (0.22.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
@@ -113,20 +118,18 @@ GEM
       addressable (>= 2.8.0)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)
-    websocket-driver (0.7.7)
-      base64
-      websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.5)
+    websocket (1.2.11)
     xpath (3.2.0)
       nokogiri (~> 1.8)
 
 PLATFORMS
   aarch64-linux
   arm64-darwin-24
+  ruby
   x86_64-linux
 
 DEPENDENCIES
-  apparition
+  capybara
   grpc-web!
   pry-byebug
   rack-cors
@@ -134,6 +137,7 @@ DEPENDENCIES
   rspec (~> 3.3)
   rubocop (~> 0.79.0)
   rubocop-rspec
+  selenium-webdriver
   simplecov
   webmock
 
diff --git a/grpc-web.gemspec b/grpc-web.gemspec
index cc12637..a2a6d46 100644
--- a/grpc-web.gemspec
+++ b/grpc-web.gemspec
@@ -24,7 +24,8 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'google-protobuf', '~> 3.13.0'
   spec.add_dependency 'rack', '>= 1.6.0', '< 3.0'
 
-  spec.add_development_dependency 'apparition'
+  spec.add_development_dependency 'capybara'
+  spec.add_development_dependency 'selenium-webdriver'
   spec.add_development_dependency 'pry-byebug'
   spec.add_development_dependency 'rack-cors'
   spec.add_development_dependency 'rake'
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index f49e786..2e4ef2d 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -109,18 +109,25 @@
     require 'test_grpc_web_app'
     Capybara.app = TestGRPCWebApp.build
 
-    require 'capybara/apparition'
-    Capybara.register_driver :apparition do |app|
-      opts = {
-        headless: true,
-        browser_options: [
-          :no_sandbox,
-          { disable_features: 'VizDisplayCompositor' },
-          :disable_gpu,
-        ],
-      }
-      Capybara::Apparition::Driver.new(app, opts)
+    require 'selenium-webdriver'
+
+    Capybara.register_driver :selenium_chrome_headless do |app|
+      options = Selenium::WebDriver::Chrome::Options.new
+      # Run Chrome without a GUI, necessary for CI/Docker environments
+      options.add_argument('--headless')
+      # Disable Chrome sandbox, required when running as root in Docker containers
+      options.add_argument('--no-sandbox')
+      # Prevent Chrome from using /dev/shm which can be too small in Docker, causing crashes
+      options.add_argument('--disable-dev-shm-usage')
+      # Disable GPU hardware acceleration to prevent crashes in headless mode
+      options.add_argument('--disable-gpu')
+
+      Capybara::Selenium::Driver.new(
+        app,
+        browser: :chrome,
+        options: options
+      )
     end
-    Capybara.default_driver = :apparition
+    Capybara.default_driver = :selenium_chrome_headless
   end
 end