diff --git a/src/morphodict/lexicon/migrations/0015_auto_20241128_2351.py b/src/morphodict/lexicon/migrations/0015_auto_20241128_2351.py
index dd421f98f..1f93f4e94 100644
--- a/src/morphodict/lexicon/migrations/0015_auto_20241128_2351.py
+++ b/src/morphodict/lexicon/migrations/0015_auto_20241128_2351.py
@@ -12,7 +12,7 @@ def migrate_semantic_domains(apps, schema_editor):
     # For every wordform, collect the semantic domain information in the old
     # format and place it where it belongs.
     wordforms = Wordform.objects.all()
-    for wf in wordforms:
+    for wf in wordforms.iterator():
         if wf.rw_indices:
             rapidwords = [x.strip() for x in wf.rw_indices.split(";")]
         else:
diff --git a/src/morphodict/lexicon/migrations/0016_auto_20241202_1907.py b/src/morphodict/lexicon/migrations/0016_auto_20241202_1907.py
index 446db0356..e36ec2b4b 100644
--- a/src/morphodict/lexicon/migrations/0016_auto_20241202_1907.py
+++ b/src/morphodict/lexicon/migrations/0016_auto_20241202_1907.py
@@ -13,7 +13,7 @@ def migrate_from_linguistinfo(apps, schema_editor):
     # For every wordform, collect the semantic domain information in the old
     # format and place it where it belongs.
     wordforms = Wordform.objects.all()
-    for wf in wordforms:
+    for wf in wordforms.iterator():
         if not wf.linguist_info:
             continue
         if "rw_indices" in wf.linguist_info: