diff --git a/lib/delegates.rb b/lib/delegates.rb
index 0406f21..6e1439e 100644
--- a/lib/delegates.rb
+++ b/lib/delegates.rb
@@ -104,7 +104,7 @@ def authorize(_options = {})
 
     # Our important cookie names
     @iv = 'initialization_vector'
-    @auth = 'sinai_authenticated_3day'
+    @auth = 'sinai_authenticated_1year'
 
     # If we have just the raw cookies header, parse it into cookies
     parse_cookies if @cookies&.key?('Cookie')
diff --git a/spec/custom_delegate_spec.rb b/spec/custom_delegate_spec.rb
index 45ece0f..1badf33 100644
--- a/spec/custom_delegate_spec.rb
+++ b/spec/custom_delegate_spec.rb
@@ -88,7 +88,7 @@
       'request_uri' => 'http://example.org/iiif/asdfasdf/full/pct:70/0/default.jpg',
       'full_size' => { 'width' => '1024', 'height' => '1024' },
       'cookies' => {
-        'sinai_authenticated_3day' => auth_cookie_value
+        'sinai_authenticated_1year' => auth_cookie_value
       }
     }
     expect(delegate.authorize).to eq(false)
@@ -101,7 +101,7 @@
       'full_size' => { 'width' => '1024', 'height' => '1024' },
       'cookies' => {
         'initialization_vector' => iv_cookie_value,
-        'sinai_authenticated_3day' => auth_cookie_value
+        'sinai_authenticated_1year' => auth_cookie_value
       }
     }
     expect(delegate.authorize).to be(true)
@@ -114,7 +114,7 @@
       'full_size' => { 'width' => '1024', 'height' => '1024' },
       'cookies' =>
         {
-          'Cookie' => 'initialization_vector=' + iv_cookie_value + '; ' + 'sinai_authenticated_3day=' + auth_cookie_value
+          'Cookie' => 'initialization_vector=' + iv_cookie_value + '; ' + 'sinai_authenticated_1year=' + auth_cookie_value
         }
     }
     expect(delegate.authorize).to be(true)
@@ -127,7 +127,7 @@
       'full_size' => { 'width' => '1024', 'height' => '1024' },
       'cookies' => {
         'initialization_vector' => iv_cookie_value,
-        'sinai_authenticated_3day' => auth_cookie_value
+        'sinai_authenticated_1year' => auth_cookie_value
       }
     }
     expect(delegate.source).to be('S3Source')