diff --git a/pyproject.toml b/pyproject.toml
index 0f6bf1e4ac..2b7a8edf8a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,7 @@ classifiers = [
     "Topic :: Internet :: WWW/HTTP",
 ]
 dependencies = [
-    "starlette>=0.40.0,<0.51.0",
+    "starlette>=0.40.0,<0.53.0",
     "pydantic>=2.7.0",
     "typing-extensions>=4.8.0",
     "annotated-doc>=0.0.2",
diff --git a/uv.lock b/uv.lock
index 931a27021b..a649d32fda 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1019,7 +1019,7 @@ dependencies = [
     { name = "annotated-doc" },
     { name = "pydantic" },
     { name = "starlette", version = "0.49.3", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.10'" },
-    { name = "starlette", version = "0.50.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.10'" },
+    { name = "starlette", version = "0.52.1", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.10'" },
     { name = "typing-extensions" },
 ]
 
@@ -1200,7 +1200,7 @@ requires-dist = [
     { name = "python-multipart", marker = "extra == 'standard'", specifier = ">=0.0.18" },
     { name = "python-multipart", marker = "extra == 'standard-no-fastapi-cloud-cli'", specifier = ">=0.0.18" },
     { name = "pyyaml", marker = "extra == 'all'", specifier = ">=5.3.1" },
-    { name = "starlette", specifier = ">=0.40.0,<0.51.0" },
+    { name = "starlette", specifier = ">=0.40.0,<0.53.0" },
     { name = "typing-extensions", specifier = ">=4.8.0" },
     { name = "ujson", marker = "extra == 'all'", specifier = ">=4.0.1,!=4.0.2,!=4.1.0,!=4.2.0,!=4.3.0,!=5.0.0,!=5.1.0" },
     { name = "uvicorn", extras = ["standard"], marker = "extra == 'all'", specifier = ">=0.12.0" },
@@ -2549,7 +2549,7 @@ dependencies = [
     { name = "python-multipart", version = "0.0.21", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.10'" },
     { name = "pywin32", marker = "python_full_version >= '3.10' and sys_platform == 'win32'" },
     { name = "sse-starlette", marker = "python_full_version >= '3.10'" },
-    { name = "starlette", version = "0.50.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.10'" },
+    { name = "starlette", version = "0.52.1", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.10'" },
     { name = "uvicorn", version = "0.40.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.10' and sys_platform != 'emscripten'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/69/2b/916852a5668f45d8787378461eaa1244876d77575ffef024483c94c0649c/mcp-1.19.0.tar.gz", hash = "sha256:213de0d3cd63f71bc08ffe9cc8d4409cc87acffd383f6195d2ce0457c021b5c1", size = 444163, upload-time = "2025-10-24T01:11:15.839Z" }
@@ -3338,7 +3338,7 @@ wheels = [
 ag-ui = [
     { name = "ag-ui-protocol" },
     { name = "starlette", version = "0.49.3", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.10'" },
-    { name = "starlette", version = "0.50.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.10'" },
+    { name = "starlette", version = "0.52.1", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.10'" },
 ]
 anthropic = [
     { name = "anthropic" },
@@ -4448,7 +4448,7 @@ version = "3.1.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "anyio", marker = "python_full_version >= '3.10'" },
-    { name = "starlette", version = "0.50.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.10'" },
+    { name = "starlette", version = "0.52.1", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.10'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/da/34/f5df66cb383efdbf4f2db23cabb27f51b1dcb737efaf8a558f6f1d195134/sse_starlette-3.1.2.tar.gz", hash = "sha256:55eff034207a83a0eb86de9a68099bd0157838f0b8b999a1b742005c71e33618", size = 26303, upload-time = "2025-12-31T08:02:20.023Z" }
 wheels = [
@@ -4473,7 +4473,7 @@ wheels = [
 
 [[package]]
 name = "starlette"
-version = "0.50.0"
+version = "0.52.1"
 source = { registry = "https://pypi.org/simple" }
 resolution-markers = [
     "python_full_version >= '3.14'",
@@ -4483,9 +4483,9 @@ dependencies = [
     { name = "anyio", marker = "python_full_version >= '3.10'" },
     { name = "typing-extensions", marker = "python_full_version >= '3.10' and python_full_version < '3.13'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/ba/b8/73a0e6a6e079a9d9cfa64113d771e421640b6f679a52eeb9b32f72d871a1/starlette-0.50.0.tar.gz", hash = "sha256:a2a17b22203254bcbc2e1f926d2d55f3f9497f769416b3190768befe598fa3ca", size = 2646985, upload-time = "2025-11-01T15:25:27.516Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/c4/68/79977123bb7be889ad680d79a40f339082c1978b5cfcf62c2d8d196873ac/starlette-0.52.1.tar.gz", hash = "sha256:834edd1b0a23167694292e94f597773bc3f89f362be6effee198165a35d62933", size = 2653702, upload-time = "2026-01-18T13:34:11.062Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/d9/52/1064f510b141bd54025f9b55105e26d1fa970b9be67ad766380a3c9b74b0/starlette-0.50.0-py3-none-any.whl", hash = "sha256:9e5391843ec9b6e472eed1365a78c8098cfceb7a74bfd4d6b1c0c0095efb3bca", size = 74033, upload-time = "2025-11-01T15:25:25.461Z" },
+    { url = "https://files.pythonhosted.org/packages/81/0d/13d1d239a25cbfb19e740db83143e95c772a1fe10202dda4b76792b114dd/starlette-0.52.1-py3-none-any.whl", hash = "sha256:0029d43eb3d273bc4f83a08720b4912ea4b071087a3b48db01b7c839f7954d74", size = 74272, upload-time = "2026-01-18T13:34:09.188Z" },
 ]
 
 [[package]]