diff --git a/CHANGELOG.md b/CHANGELOG.md
index 30c5578..00dc129 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,12 @@
+6.3.3
+-----
+
+- Set `number_of_shards` and `number_of_replicas` to `1` when creating indexes 
+
 6.3.2
 -----
 
-- Fix the `monthly_indexes` option in the `elastocsearch` configuration section
+- Fix the `monthly_indexes` option in the `elasticsearch` configuration section
 
 6.3.1
 -----
diff --git a/parsedmarc/__init__.py b/parsedmarc/__init__.py
index e729bb9..895e1a8 100644
--- a/parsedmarc/__init__.py
+++ b/parsedmarc/__init__.py
@@ -38,7 +38,7 @@ from parsedmarc.utils import is_outlook_msg, convert_outlook_msg
 from parsedmarc.utils import timestamp_to_human, human_timestamp_to_datetime
 from parsedmarc.utils import parse_email
 
-__version__ = "6.3.2"
+__version__ = "6.3.3"
 
 logging.basicConfig(
     format='%(levelname)8s:%(filename)s:%(lineno)d:'
diff --git a/parsedmarc/elastic.py b/parsedmarc/elastic.py
index c7cd7eb..771f8d8 100644
--- a/parsedmarc/elastic.py
+++ b/parsedmarc/elastic.py
@@ -208,8 +208,10 @@ def create_indexes(names, settings=None):
         try:
             if not index.exists():
                 logger.debug("Creating Elasticsearch index: {0}".format(name))
-                if settings:
-                    index.put_settings(settings)
+                if settings is None:
+                    settings = dict(number_of_shards=1,
+                                    number_of_replicas=1)
+                index.put_settings(settings)
                 index.create()
         except Exception as e:
             raise ElasticsearchError(
diff --git a/setup.py b/setup.py
index 370b869..c79db71 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@ from setuptools import setup
 from codecs import open
 from os import path
 
-__version__ = "6.3.2"
+__version__ = "6.3.3"
 
 description = "A Python package and CLI for parsing aggregate and " \
               "forensic DMARC reports"