diff --git a/CHANGELOG.md b/CHANGELOG.md
index b960c69..62a8386 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## Unreleased
 
 - Fix issue where freshness cannot be calculated to re-send request. (#104)
+- Update `datetime.datetime.utcnow()` to `datetime.datetime.now(datetime.timezone.utc)` since `datetime.datetime.utcnow()` has been deprecated. (#111)
 
 ## 0.0.17 (6/11/2023) 
 
diff --git a/hishel/_async/_pool.py b/hishel/_async/_pool.py
index c9ab709..b667b0e 100644
--- a/hishel/_async/_pool.py
+++ b/hishel/_async/_pool.py
@@ -116,7 +116,9 @@ async def handle_async_request(self, request: Request) -> Response:
 
         if self._controller.is_cachable(request=request, response=response):
             await response.aread()
-            metadata = Metadata(cache_key=key, created_at=datetime.datetime.utcnow(), number_of_uses=0)
+            metadata = Metadata(
+                cache_key=key, created_at=datetime.datetime.now(datetime.timezone.utc), number_of_uses=0
+            )
             await self._storage.store(key, response=response, request=request, metadata=metadata)
 
         response.extensions["from_cache"] = False  # type: ignore[index]
diff --git a/hishel/_async/_transports.py b/hishel/_async/_transports.py
index af44866..d62562a 100644
--- a/hishel/_async/_transports.py
+++ b/hishel/_async/_transports.py
@@ -200,7 +200,9 @@ async def handle_async_request(self, request: Request) -> Response:
         await httpcore_response.aclose()
 
         if self._controller.is_cachable(request=httpcore_request, response=httpcore_response):
-            metadata = Metadata(cache_key=key, created_at=datetime.datetime.utcnow(), number_of_uses=0)
+            metadata = Metadata(
+                cache_key=key, created_at=datetime.datetime.now(datetime.timezone.utc), number_of_uses=0
+            )
             await self._storage.store(
                 key,
                 response=httpcore_response,
diff --git a/hishel/_sync/_pool.py b/hishel/_sync/_pool.py
index 7c53d4e..330f5b4 100644
--- a/hishel/_sync/_pool.py
+++ b/hishel/_sync/_pool.py
@@ -116,7 +116,7 @@ def handle_request(self, request: Request) -> Response:
 
         if self._controller.is_cachable(request=request, response=response):
             response.read()
-            metadata = Metadata(cache_key=key, created_at=datetime.datetime.utcnow(), number_of_uses=0)
+            metadata = Metadata(cache_key=key, created_at=datetime.datetime.now(datetime.timezone.utc), number_of_uses=0)
             self._storage.store(key, response=response, request=request, metadata=metadata)
 
         response.extensions["from_cache"] = False  # type: ignore[index]
diff --git a/hishel/_sync/_transports.py b/hishel/_sync/_transports.py
index 7c089a4..c0c5c8a 100644
--- a/hishel/_sync/_transports.py
+++ b/hishel/_sync/_transports.py
@@ -200,7 +200,7 @@ def handle_request(self, request: Request) -> Response:
         httpcore_response.close()
 
         if self._controller.is_cachable(request=httpcore_request, response=httpcore_response):
-            metadata = Metadata(cache_key=key, created_at=datetime.datetime.utcnow(), number_of_uses=0)
+            metadata = Metadata(cache_key=key, created_at=datetime.datetime.now(datetime.timezone.utc), number_of_uses=0)
             self._storage.store(
                 key,
                 response=httpcore_response,
diff --git a/tests/_async/test_storages.py b/tests/_async/test_storages.py
index f7be3de..0dadaa5 100644
--- a/tests/_async/test_storages.py
+++ b/tests/_async/test_storages.py
@@ -8,7 +8,7 @@
 from hishel._serializers import Metadata
 from hishel._utils import asleep, generate_key
 
-dummy_metadata = Metadata(cache_key="test", number_of_uses=0, created_at=datetime.datetime.utcnow())
+dummy_metadata = Metadata(cache_key="test", number_of_uses=0, created_at=datetime.datetime.now(datetime.timezone.utc))
 
 
 async def is_redis_down() -> bool:
diff --git a/tests/_sync/test_storages.py b/tests/_sync/test_storages.py
index d390d04..b03062d 100644
--- a/tests/_sync/test_storages.py
+++ b/tests/_sync/test_storages.py
@@ -8,7 +8,7 @@
 from hishel._serializers import Metadata
 from hishel._utils import sleep, generate_key
 
-dummy_metadata = Metadata(cache_key="test", number_of_uses=0, created_at=datetime.datetime.utcnow())
+dummy_metadata = Metadata(cache_key="test", number_of_uses=0, created_at=datetime.datetime.now(datetime.timezone.utc))
 
 
 def is_redis_down() -> bool: