diff --git a/README.md b/README.md
index 21bae5d..7d2bade 100644
--- a/README.md
+++ b/README.md
@@ -112,9 +112,9 @@ Note: This expects storage (5002) and scheduler (5008) services to run locally
     [GCC 8.1.0] on linux
     Type "help", "copyright", "credits" or "license" for more information.
     >>> from swh.lister.gitlab.tasks import RangeGitLabLister; RangeGitLabLister().run_task(1, 2,
-      {'instance': 'debian', 'api_baseurl': 'https://salsa.debian.org/api/v4', 'sort': 'asc'})
+      {'instance': 'debian', 'api_baseurl': 'https://salsa.debian.org/api/v4', 'sort': 'asc', 'per_page': 20})
     >>> from swh.lister.gitlab.tasks import FullGitLabRelister; FullGitLabRelister().run_task(
-      {'instance':'0xacab', 'api_baseurl':'https://0xacab.org/api/v4', 'sort': 'asc'})
+      {'instance':'0xacab', 'api_baseurl':'https://0xacab.org/api/v4', 'sort': 'asc', 'per_page': 20})
     >>> from swh.lister.gitlab.tasks import IncrementalGitLabLister; IncrementalGitLabLister().run_task(
       {'instance': 'freedesktop.org', 'api_baseurl': 'https://gitlab.freedesktop.org/api/v4',
-       'sort': 'asc'})
+       'sort': 'asc', 'per_page': 20})
diff --git a/swh/lister/gitlab/lister.py b/swh/lister/gitlab/lister.py
index 654cfc3..d24d773 100644
--- a/swh/lister/gitlab/lister.py
+++ b/swh/lister/gitlab/lister.py
@@ -16,11 +16,14 @@ class GitLabLister(PageByPageHttpLister):
     LISTER_NAME = 'gitlab'
 
     def __init__(self, api_baseurl=None, instance=None,
-                 override_config=None, sort='asc'):
+                 override_config=None, sort='asc', per_page=20):
         super().__init__(api_baseurl=api_baseurl,
                          override_config=override_config)
         self.instance = instance
         self.PATH_TEMPLATE = '%s&sort=%s' % (self.PATH_TEMPLATE, sort)
+        if per_page != 20:
+            self.PATH_TEMPLATE = '%s&per_page=%s' % (
+                self.PATH_TEMPLATE, per_page)
 
     @property
     def ADDITIONAL_CONFIG(self):
diff --git a/swh/lister/gitlab/tasks.py b/swh/lister/gitlab/tasks.py
index 84675a1..9adcf12 100644
--- a/swh/lister/gitlab/tasks.py
+++ b/swh/lister/gitlab/tasks.py
@@ -13,7 +13,7 @@ from .lister import GitLabLister
 
 class GitLabListerTask(ListerTaskBase):
     def new_lister(self, *, api_baseurl='https://gitlab.com/api/v4',
-                   instance='gitlab', sort='asc'):
+                   instance='gitlab', sort='asc', per_page=20):
         return GitLabLister(
             api_baseurl=api_baseurl, instance=instance, sort=sort)