diff --git a/contrib/automation/hgautomation/aws.py b/contrib/automation/hgautomation/aws.py
--- a/contrib/automation/hgautomation/aws.py
+++ b/contrib/automation/hgautomation/aws.py
@@ -847,7 +847,7 @@
                 'DeviceName': image.block_device_mappings[0]['DeviceName'],
                 'Ebs': {
                     'DeleteOnTermination': True,
-                    'VolumeSize': 8,
+                    'VolumeSize': 10,
                     'VolumeType': 'gp2',
                 },
             },