diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 488f1adb5e..d23d0104a4 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.55.2"
+  ".": "1.55.3"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8009aac671..866d34cb4f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 1.55.3 (2024-11-28)
+
+Full Changelog: [v1.55.2...v1.55.3](https://github.com/openai/openai-python/compare/v1.55.2...v1.55.3)
+
+### Bug Fixes
+
+* **client:** compat with new httpx 0.28.0 release ([#1904](https://github.com/openai/openai-python/issues/1904)) ([72b6c63](https://github.com/openai/openai-python/commit/72b6c636c526885ef873580a07eff1c18e76bc10))
+
 ## 1.55.2 (2024-11-27)
 
 Full Changelog: [v1.55.1...v1.55.2](https://github.com/openai/openai-python/compare/v1.55.1...v1.55.2)
diff --git a/pyproject.toml b/pyproject.toml
index 4842cceea4..06c0e7fd73 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "openai"
-version = "1.55.2"
+version = "1.55.3"
 description = "The official Python library for the openai API"
 dynamic = ["readme"]
 license = "Apache-2.0"
diff --git a/src/openai/_base_client.py b/src/openai/_base_client.py
index 187518787a..cceec903d9 100644
--- a/src/openai/_base_client.py
+++ b/src/openai/_base_client.py
@@ -794,6 +794,7 @@ def __init__(
         custom_query: Mapping[str, object] | None = None,
         _strict_response_validation: bool,
     ) -> None:
+        kwargs: dict[str, Any] = {}
         if limits is not None:
             warnings.warn(
                 "The `connection_pool_limits` argument is deprecated. The `http_client` argument should be passed instead",
@@ -806,6 +807,7 @@ def __init__(
             limits = DEFAULT_CONNECTION_LIMITS
 
         if transport is not None:
+            kwargs["transport"] = transport
             warnings.warn(
                 "The `transport` argument is deprecated. The `http_client` argument should be passed instead",
                 category=DeprecationWarning,
@@ -815,6 +817,7 @@ def __init__(
                 raise ValueError("The `http_client` argument is mutually exclusive with `transport`")
 
         if proxies is not None:
+            kwargs["proxies"] = proxies
             warnings.warn(
                 "The `proxies` argument is deprecated. The `http_client` argument should be passed instead",
                 category=DeprecationWarning,
@@ -858,10 +861,9 @@ def __init__(
             base_url=base_url,
             # cast to a valid type because mypy doesn't understand our type narrowing
             timeout=cast(Timeout, timeout),
-            proxies=proxies,
-            transport=transport,
             limits=limits,
             follow_redirects=True,
+            **kwargs,  # type: ignore
         )
 
     def is_closed(self) -> bool:
@@ -1375,6 +1377,7 @@ def __init__(
         custom_headers: Mapping[str, str] | None = None,
         custom_query: Mapping[str, object] | None = None,
     ) -> None:
+        kwargs: dict[str, Any] = {}
         if limits is not None:
             warnings.warn(
                 "The `connection_pool_limits` argument is deprecated. The `http_client` argument should be passed instead",
@@ -1387,6 +1390,7 @@ def __init__(
             limits = DEFAULT_CONNECTION_LIMITS
 
         if transport is not None:
+            kwargs["transport"] = transport
             warnings.warn(
                 "The `transport` argument is deprecated. The `http_client` argument should be passed instead",
                 category=DeprecationWarning,
@@ -1396,6 +1400,7 @@ def __init__(
                 raise ValueError("The `http_client` argument is mutually exclusive with `transport`")
 
         if proxies is not None:
+            kwargs["proxies"] = proxies
             warnings.warn(
                 "The `proxies` argument is deprecated. The `http_client` argument should be passed instead",
                 category=DeprecationWarning,
@@ -1439,10 +1444,9 @@ def __init__(
             base_url=base_url,
             # cast to a valid type because mypy doesn't understand our type narrowing
             timeout=cast(Timeout, timeout),
-            proxies=proxies,
-            transport=transport,
             limits=limits,
             follow_redirects=True,
+            **kwargs,  # type: ignore
         )
 
     def is_closed(self) -> bool:
diff --git a/src/openai/_version.py b/src/openai/_version.py
index 5b04f5cc00..c6d4c88a6d 100644
--- a/src/openai/_version.py
+++ b/src/openai/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "openai"
-__version__ = "1.55.2"  # x-release-please-version
+__version__ = "1.55.3"  # x-release-please-version