diff --git a/deployer/src/deployer/search/__init__.py b/deployer/src/deployer/search/__init__.py
index 625d299dcd65..fbd600783388 100644
--- a/deployer/src/deployer/search/__init__.py
+++ b/deployer/src/deployer/search/__init__.py
@@ -90,9 +90,10 @@ def get_progressbar():
     errors_counter = Counter()
     t0 = time.time()
     with get_progressbar() as bar:
-        for success, info in bulk(
+        for success, info in parallel_bulk(
             connection,
             generator(),
+            thread_count=1,
             # If the bulk indexing failed, it will by default raise a BulkIndexError.
             # Setting this to 'False' will suppress that.
             raise_on_exception=False,