diff --git a/app/apps/api/serializers/transactions.py b/app/apps/api/serializers/transactions.py
index 137e849..89a5e8e 100644
--- a/app/apps/api/serializers/transactions.py
+++ b/app/apps/api/serializers/transactions.py
@@ -53,7 +53,9 @@ class TransactionSerializer(serializers.ModelSerializer):
         queryset=Account.objects.all(), source="account", write_only=True
     )
 
-    reference_date = serializers.DateField(required=False)
+    reference_date = serializers.DateField(
+        required=False, input_formats=["iso-8601", "%Y-%m"]
+    )
 
     permission_classes = [IsAuthenticated]