diff --git a/.github/scripts/delete_stacks.sh b/.github/scripts/delete_stacks.sh
index 26ad15ef..faac0236 100755
--- a/.github/scripts/delete_stacks.sh
+++ b/.github/scripts/delete_stacks.sh
@@ -13,8 +13,8 @@ CAPTURE_REGEX="^clinical-tracker-(sandbox-)?pr-(\\d+)$"
 PULL_REQUEST_STACK_REGEX=clinical-tracker-pr-
 SANDBOX_PULL_REQUEST_STACK_REGEX=clinical-tracker-sandbox-pr-
 
-CNAME_QUERY=clinical-tracker-pr-3
-CNAME_SANDBOX_QUERY=clinical-tracker-sandbox-pr-3
+CNAME_QUERY=clinical-tracker-pr-7
+CNAME_SANDBOX_QUERY=clinical-tracker-sandbox-pr-7
 
 # this should be customised to delete cloudformation stacks and proxygen deployments if they are used
 main() {