diff --git a/CHANGELOG.md b/CHANGELOG.md
index cafa414..0a51673 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## v9.0.1 (2023-12-20)
+
+- Corrects the return type of `regenerate_rates`
+
 ## v9.0.0 (2023-12-06)
 
 See our [Upgrade Guide](UPGRADE_GUIDE.md#upgrading-from-8x-to-90) for more details.
diff --git a/easypost/services/shipment_service.py b/easypost/services/shipment_service.py
index aa85bc9..409eb7b 100644
--- a/easypost/services/shipment_service.py
+++ b/easypost/services/shipment_service.py
@@ -72,7 +72,7 @@ def get_next_page(
 
         return self.all(**params)
 
-    def regenerate_rates(self, id: str) -> Shipment:
+    def regenerate_rates(self, id: str) -> Dict[str, List[Rate]]:
         """Regenerate Rates for a Shipment."""
         url = f"{self._instance_url(self._model_class, id)}/rerate"
 
diff --git a/easypost/util.py b/easypost/util.py
index b46555c..31a81ea 100644
--- a/easypost/util.py
+++ b/easypost/util.py
@@ -7,6 +7,7 @@
     Dict,
     List,
     Optional,
+    Union,
 )
 
 from easypost.constant import (
@@ -24,14 +25,15 @@
     InvalidParameterError,
     SignatureVerificationError,
 )
+from easypost.models.rate import Rate
 
 
 def get_lowest_object_rate(
-    easypost_object: EasyPostObject,
+    easypost_object: Union[EasyPostObject, Dict[str, Any]],
     carriers: Optional[List[str]] = None,
     services: Optional[List[str]] = None,
     rates_key: str = "rates",
-):
+) -> Rate:
     """Gets the lowest rate of an EasyPost object such as a Shipment, Order, or Pickup."""
     carriers = carriers or []
     services = services or []
@@ -53,7 +55,7 @@ def get_lowest_object_rate(
     return lowest_rate
 
 
-def get_lowest_smart_rate(smart_rates, delivery_days: int, delivery_accuracy: str):
+def get_lowest_smart_rate(smart_rates: List[Rate], delivery_days: int, delivery_accuracy: str) -> Rate:
     """Get the lowest SmartRate from a list of SmartRates."""
     valid_delivery_accuracy_values = {
         "percentile_50",