diff --git a/nise/__init__.py b/nise/__init__.py
index 023beaa0..9557e01a 100644
--- a/nise/__init__.py
+++ b/nise/__init__.py
@@ -1,3 +1,3 @@
-__version__ = "4.5.1"
+__version__ = "4.5.2"
 
 VERSION = __version__.split(".")
diff --git a/nise/generators/aws/ec2_generator.py b/nise/generators/aws/ec2_generator.py
index a1a81927..16e0b618 100644
--- a/nise/generators/aws/ec2_generator.py
+++ b/nise/generators/aws/ec2_generator.py
@@ -97,11 +97,8 @@ class EC2Generator(AWSGenerator):
     def __init__(self, start_date, end_date, currency, payer_account, usage_accounts, attributes=None, tag_cols=None):
         """Initialize the EC2 generator."""
         super().__init__(start_date, end_date, currency, payer_account, usage_accounts, attributes, tag_cols)
-        self._processor_arch = choice(self.ARCHS)
-        self._resource_id = "i-{}".format(self.fake.ean8())
-        self._product_sku = self.fake.pystr(min_chars=12, max_chars=12).upper()
         self._instance_type = choice(self.INSTANCE_TYPES)
-        self._operating_system = choice(self.OPERATING_SYSTEMS)
+        self._operating_system = self.attributes.get("operating_system", choice(self.OPERATING_SYSTEMS))
         self._processor_arch = self.attributes.get("processor_arch", choice(self.ARCHS))
         self._resource_id = f"i-{self.attributes.get('resource_id', self.fake.ean8())}"
         self._product_sku = self.attributes.get("product_sku", self.fake.pystr(min_chars=12, max_chars=12).upper())