diff --git a/substra/__version__.py b/substra/__version__.py
index ea715acd..c40e0762 100644
--- a/substra/__version__.py
+++ b/substra/__version__.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.29.1"
+__version__ = "0.29.2"
diff --git a/substra/sdk/client.py b/substra/sdk/client.py
index bf1f7f84..e40155d8 100644
--- a/substra/sdk/client.py
+++ b/substra/sdk/client.py
@@ -33,7 +33,7 @@
 logger = logging.getLogger(__name__)
 
 DEFAULT_RETRY_TIMEOUT = 5 * 60
-DEFAULT_BATCH_SIZE = 20
+DEFAULT_BATCH_SIZE = 400
 
 
 def logit(f):