diff --git a/libs/standard-tests/poetry.lock b/libs/standard-tests/poetry.lock
index a10861100dffca..853d7f67dd3228 100644
--- a/libs/standard-tests/poetry.lock
+++ b/libs/standard-tests/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.8.3 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.8.4 and should not be changed by hand.
 
 [[package]]
 name = "annotated-types"
@@ -234,13 +234,13 @@ trio = ["trio (>=0.22.0,<1.0)"]
 
 [[package]]
 name = "httpx"
-version = "0.27.2"
+version = "0.28.0"
 description = "The next generation HTTP client."
 optional = false
 python-versions = ">=3.8"
 files = [
-    {file = "httpx-0.27.2-py3-none-any.whl", hash = "sha256:7bb2708e112d8fdd7829cd4243970f0c223274051cb35ee80c03301ee29a3df0"},
-    {file = "httpx-0.27.2.tar.gz", hash = "sha256:f7c2be1d2f3c3c3160d441802406b206c2b76f5947b11115e6df10c6c65e66c2"},
+    {file = "httpx-0.28.0-py3-none-any.whl", hash = "sha256:dc0b419a0cfeb6e8b34e85167c0da2671206f5095f1baa9663d23bcfd6b535fc"},
+    {file = "httpx-0.28.0.tar.gz", hash = "sha256:0858d3bab51ba7e386637f22a61d8ccddaeec5f3fe4209da3a6168dbb91573e0"},
 ]
 
 [package.dependencies]
@@ -248,7 +248,6 @@ anyio = "*"
 certifi = "*"
 httpcore = "==1.*"
 idna = "*"
-sniffio = "*"
 
 [package.extras]
 brotli = ["brotli", "brotlicffi"]
@@ -933,4 +932,4 @@ zstd = ["zstandard (>=0.18.0)"]
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.9,<4.0"
-content-hash = "f92550d052b48eb60c41c6baa12c158391f7c1e5453b824ac212aa1e75260b1f"
+content-hash = "dda3ea5d0c6be865ff957c2670c820f74565926ee71bead7c0d62a0cfb092ae9"
diff --git a/libs/standard-tests/pyproject.toml b/libs/standard-tests/pyproject.toml
index cb15fa4968312f..534499ac15f966 100644
--- a/libs/standard-tests/pyproject.toml
+++ b/libs/standard-tests/pyproject.toml
@@ -21,7 +21,7 @@ disallow_untyped_defs = "True"
 python = ">=3.9,<4.0"
 langchain-core = "^0.3.19"
 pytest = ">=7,<9"
-httpx = "^0.27.0"
+httpx = "^0.28.0"
 syrupy = "^4"
 
 [tool.ruff.lint]