diff --git a/lib/capybara/apparition/page.rb b/lib/capybara/apparition/page.rb
index 50f24ae..e4607a3 100644
--- a/lib/capybara/apparition/page.rb
+++ b/lib/capybara/apparition/page.rb
@@ -157,7 +157,7 @@ def render(options)
           %w[x y width height].each_with_object({}) { |key, hash| hash[key] = pos[key] }
         elsif options[:full]
           evaluate <<~JS
-            { width: document.documentElement.clientWidth, height: document.documentElement.clientHeight}
+            { width: document.documentElement.scrollWidth, height: document.documentElement.scrollHeight}
           JS
         else
           evaluate <<~JS
@@ -165,6 +165,7 @@ def render(options)
           JS
         end
         options[:clip] = { x: 0, y: 0, scale: scale }.merge(clip_options)
+        options[:captureBeyondViewport] = true
         command('Page.captureScreenshot', **options)
       end['data']
     end
diff --git a/spec/integration/driver_spec.rb b/spec/integration/driver_spec.rb
index 06861ea..873142a 100644
--- a/spec/integration/driver_spec.rb
+++ b/spec/integration/driver_spec.rb
@@ -169,7 +169,7 @@ def session_url(path)
 
         create_screenshot file, full: true
         expect(FastImage.size(file)).to eq(
-          @driver.evaluate_script('[document.documentElement.clientWidth, document.documentElement.clientHeight]')
+          @driver.evaluate_script('[document.documentElement.scrollWidth, document.documentElement.scrollHeight]')
         )
       end
 
@@ -203,7 +203,7 @@ def session_url(path)
         create_screenshot file, full: true, selector: '#penultimate'
 
         expect(FastImage.size(file)).to eq(
-          @driver.evaluate_script('[document.documentElement.clientWidth, document.documentElement.clientHeight]')
+          @driver.evaluate_script('[document.documentElement.scrollWidth, document.documentElement.scrollHeight]')
         )
       end