diff --git a/release-scripts/create-branches b/release-scripts/create-branches
index 5dd77c982a685c990c419bcdfba912ab64733b0e..0706be46e3dc58c259aa4139456821fc06b4a361 100755
--- a/release-scripts/create-branches
+++ b/release-scripts/create-branches
@@ -202,7 +202,7 @@ class Brancher:
             projects.extend(p)
 
         total_pages = self.gl.projects.list(
-            as_list=False, per_page=per_page, **kwargs
+            iterator=True, per_page=per_page, **kwargs
         ).total_pages
         thread_pool(
             num_worker_threads, _fetch_page, range(1, total_pages + 1), num_retries=2
diff --git a/release-scripts/delete-branches b/release-scripts/delete-branches
index 1bd870ce87441f57596bf4174dc433b25b01fd86..3beb087683b47ea418582de4b24fc736e7aeaebc 100755
--- a/release-scripts/delete-branches
+++ b/release-scripts/delete-branches
@@ -112,7 +112,7 @@ class Brancher:
             projects.extend(p)
 
         total_pages = self.gl.projects.list(
-            as_list=False, per_page=per_page, **kwargs
+            iterator=True, per_page=per_page, **kwargs
         ).total_pages
         thread_pool(
             num_worker_threads, _fetch_page, range(1, total_pages + 1), num_retries=2