diff --git a/includes/include.drupalci.hidden-variables.yml b/includes/include.drupalci.hidden-variables.yml
index e29cf93642c99a5885bae7230a33aa2b270327e9..b127636802f2832b453e2a06ca08983330854b62 100644
--- a/includes/include.drupalci.hidden-variables.yml
+++ b/includes/include.drupalci.hidden-variables.yml
@@ -25,7 +25,7 @@ variables:
   CORE_SECURITY_PREVIOUS_MINOR: '11.0.8'
 
   # The most recent, stable previous major version of Drupal.
-  CORE_PREVIOUS_STABLE: '10.3.10'
+  CORE_PREVIOUS_STABLE: '10.4.0'
 
   # The most recent security release in the previous major version of Drupal.
   CORE_PREVIOUS_SECURITY: '10.3.9'