diff --git a/python/packages/ag-ui/pyproject.toml b/python/packages/ag-ui/pyproject.toml
index df25af07d24..eb4c6c0fc31 100644
--- a/python/packages/ag-ui/pyproject.toml
+++ b/python/packages/ag-ui/pyproject.toml
@@ -25,7 +25,7 @@ classifiers = [
 dependencies = [
     "agent-framework-core>=1.22.0,<2",
     "ag-ui-protocol>=0.1.19,<0.2",
-    "fastapi>=0.121.0,<0.142.0",
+    "fastapi>=0.121.0,<0.163.0",
     "httpx>=0.28.1,<1",
     "sse-starlette>=3.4.5,<4",
     "uvicorn[standard]>=0.30.0,<1"
diff --git a/python/packages/devui/pyproject.toml b/python/packages/devui/pyproject.toml
index 9b05f48dc03..33f39563e4a 100644
--- a/python/packages/devui/pyproject.toml
+++ b/python/packages/devui/pyproject.toml
@@ -26,7 +26,7 @@ classifiers = [
      "agent-framework-core>=1.23.0,<2",
      "openai>=2.45.0,<4",
      "opentelemetry-sdk>=1.39.0,<2",
-     "fastapi>=0.115.0,<0.142.0",
+     "fastapi>=0.115.0,<0.163.0",
      "uvicorn[standard]>=0.30.0,<1"
  ]
 
diff --git a/python/packages/hosting-responses/pyproject.toml b/python/packages/hosting-responses/pyproject.toml
index 660709ccd63..4fb41493442 100644
--- a/python/packages/hosting-responses/pyproject.toml
+++ b/python/packages/hosting-responses/pyproject.toml
@@ -30,7 +30,7 @@ dependencies = [
 
 [dependency-groups]
 test = [
-    "fastapi>=0.115.0,<0.142.0",
+    "fastapi>=0.115.0,<0.163.0",
     "httpx>=0.28.1",
 ]
 
diff --git a/python/uv.lock b/python/uv.lock
index 089e8481beb..98cba61b551 100644
--- a/python/uv.lock
+++ b/python/uv.lock
@@ -228,7 +228,7 @@ requires-dist = [
     { name = "ag-ui-a2ui-toolkit", marker = "extra == 'a2ui'", specifier = ">=0.0.5" },
     { name = "ag-ui-protocol", specifier = ">=0.1.19,<0.2" },
     { name = "agent-framework-core", editable = "packages/core" },
-    { name = "fastapi", specifier = ">=0.121.0,<0.142.0" },
+    { name = "fastapi", specifier = ">=0.121.0,<0.163.0" },
     { name = "httpx", specifier = ">=0.28.1,<1" },
     { name = "pytest", marker = "extra == 'dev'", specifier = "==9.1.1" },
     { name = "sse-starlette", specifier = ">=3.4.5,<4" },
@@ -630,7 +630,7 @@ dev = [
 requires-dist = [
     { name = "agent-framework-core", editable = "packages/core" },
     { name = "agent-framework-orchestrations", marker = "extra == 'dev'", editable = "packages/orchestrations" },
-    { name = "fastapi", specifier = ">=0.115.0,<0.142.0" },
+    { name = "fastapi", specifier = ">=0.115.0,<0.163.0" },
     { name = "openai", specifier = ">=2.45.0,<4" },
     { name = "opentelemetry-sdk", specifier = ">=1.39.0,<2" },
     { name = "pytest", marker = "extra == 'all'", specifier = "==9.1.1" },
@@ -863,7 +863,7 @@ requires-dist = [
 
 [package.metadata.requires-dev]
 test = [
-    { name = "fastapi", specifier = ">=0.115.0,<0.142.0" },
+    { name = "fastapi", specifier = ">=0.115.0,<0.163.0" },
     { name = "httpx", specifier = ">=0.28.1" },
 ]
 
@@ -2265,18 +2265,19 @@ wheels = [
 
 [[package]]
 name = "fastapi"
-version = "0.141.1"
+version = "0.162.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "annotated-doc" },
+    { name = "opentelemetry-api" },
     { name = "pydantic" },
     { name = "starlette" },
     { name = "typing-extensions" },
     { name = "typing-inspection" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/8a/02/91e3416a8fdd715abb903a952a6bec7cdd8d14eed55d415fc8595524c319/fastapi-0.141.1.tar.gz", hash = "sha256:e8822fc40db1e1858054d7a949a888695bc9bdce70139178e33bd2871a453ca1", size = 425799, upload-time = "2026-07-29T17:18:05.568Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/e9/eb/2cf8c80abf09b2800aef0a83b41066fbfda8ee5495b7a08b9d1af40f7046/fastapi-0.162.0.tar.gz", hash = "sha256:6a22c1e2e6e32e0633ee7e170f00009a29b8228b16feb219ee42f32fd8d88a8f", size = 527867, upload-time = "2026-10-23T18:47:33.264Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/cb/03/10388a42375ee7e4ac9b94eb2c5c569c8b5795e377e701c9ac3ad63de890/fastapi-0.141.1-py3-none-any.whl", hash = "sha256:bfb91aa2d334c61cb35ba9a116fc123b3d3df31640b801cf57a7a78ec3f603b3", size = 131954, upload-time = "2026-07-29T17:18:04.364Z" },
+    { url = "https://files.pythonhosted.org/packages/b4/4f/3f2c25c9b43970b5e9a08beb5e04776247edea684ddc0930f4f02f0bb6cb/fastapi-0.162.0-py3-none-any.whl", hash = "sha256:3785963de305dd09912426cb81f2d230fce98ab3521cdfe97265c8d14983128c", size = 148912, upload-time = "2026-10-23T18:47:31.734Z" },
 ]
 
 [[package]]