diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3d8e2371..9bb7a45c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## Unreleased
 
+- Fix inner transport and connection pool instances closing. (#147)
 - Improved error message when the storage type is incorrect. (#138)
 
 ## 0.0.20 (12/12/2023)
diff --git a/hishel/_async/_pool.py b/hishel/_async/_pool.py
index d0ca4916..6f6bbdcf 100644
--- a/hishel/_async/_pool.py
+++ b/hishel/_async/_pool.py
@@ -135,6 +135,9 @@ async def handle_async_request(self, request: Request) -> Response:
     async def aclose(self) -> None:
         await self._storage.aclose()
 
+        if hasattr(self._pool, "aclose"):  # pragma: no cover
+            await self._pool.aclose()
+
     async def __aenter__(self: T) -> T:
         return self
 
diff --git a/hishel/_async/_transports.py b/hishel/_async/_transports.py
index 76112227..0edb10dd 100644
--- a/hishel/_async/_transports.py
+++ b/hishel/_async/_transports.py
@@ -235,6 +235,7 @@ async def handle_async_request(self, request: Request) -> Response:
 
     async def aclose(self) -> None:
         await self._storage.aclose()
+        await self._transport.aclose()
 
     async def __aenter__(self) -> "Self":
         return self
diff --git a/hishel/_sync/_pool.py b/hishel/_sync/_pool.py
index c697b7d5..543a0dba 100644
--- a/hishel/_sync/_pool.py
+++ b/hishel/_sync/_pool.py
@@ -135,6 +135,9 @@ def handle_request(self, request: Request) -> Response:
     def close(self) -> None:
         self._storage.close()
 
+        if hasattr(self._pool, "close"):  # pragma: no cover
+            self._pool.close()
+
     def __enter__(self: T) -> T:
         return self
 
diff --git a/hishel/_sync/_transports.py b/hishel/_sync/_transports.py
index 215e03e4..2ee49873 100644
--- a/hishel/_sync/_transports.py
+++ b/hishel/_sync/_transports.py
@@ -235,6 +235,7 @@ def handle_request(self, request: Request) -> Response:
 
     def close(self) -> None:
         self._storage.close()
+        self._transport.close()
 
     def __enter__(self) -> "Self":
         return self