diff --git a/docs/api/conf.py b/docs/api/conf.py
index ef4df8e96..5f7a3c2dc 100644
--- a/docs/api/conf.py
+++ b/docs/api/conf.py
@@ -102,6 +102,14 @@ autodoc_mock_imports = [
     "openai.types.beta.realtime",
     "langchain_core",
     "langchain_core.messages",
+    # FastAPI - Pydantic v2 compatibility issues during Sphinx autodoc
+    "fastapi",
+    "fastapi.applications",
+    "fastapi.routing",
+    "fastapi.params",
+    "fastapi.middleware",
+    "fastapi.responses",
+    "uvicorn",
 ]
 
 # HTML output settings
diff --git a/pyproject.toml b/pyproject.toml
index a6b5afafa..4dc92b879 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -97,7 +97,7 @@ qwen = []
 remote-smart-turn = []
 rime = [ "pipecat-ai[websockets-base]" ]
 riva = [ "pipecat-ai[nvidia]" ]
-runner = [ "python-dotenv>=1.0.0,<2.0.0", "uvicorn>=0.32.0,<1.0.0", "fastapi>=0.115.6,<0.122.0", "pipecat-ai-small-webrtc-prebuilt>=2.0.4"]
+runner = [ "python-dotenv>=1.0.0,<2.0.0", "uvicorn>=0.32.0,<1.0.0", "fastapi>=0.115.6,<0.128.0", "pipecat-ai-small-webrtc-prebuilt>=2.0.4"]
 sagemaker = ["aws_sdk_sagemaker_runtime_http2; python_version>='3.12'"]
 sambanova = []
 sarvam = [ "sarvamai==0.1.21", "pipecat-ai[websockets-base]" ]
@@ -113,7 +113,7 @@ together = []
 tracing = [ "opentelemetry-sdk>=1.33.0", "opentelemetry-api>=1.33.0", "opentelemetry-instrumentation>=0.54b0" ]
 ultravox = [ "pipecat-ai[websockets-base]" ]
 webrtc = [ "aiortc>=1.14.0,<2", "opencv-python>=4.11.0.86,<5" ]
-websocket = [ "pipecat-ai[websockets-base]", "fastapi>=0.115.6,<0.122.0" ]
+websocket = [ "pipecat-ai[websockets-base]", "fastapi>=0.115.6,<0.128.0" ]
 websockets-base = [ "websockets>=13.1,<16.0" ]
 whisper = [ "faster-whisper~=1.1.1" ]
 
diff --git a/uv.lock b/uv.lock
index 43a44bb5c..45c1f892f 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1446,7 +1446,7 @@ wheels = [
 
 [[package]]
 name = "fastapi"
-version = "0.121.3"
+version = "0.127.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "annotated-doc" },
@@ -1454,9 +1454,9 @@ dependencies = [
     { name = "starlette" },
     { name = "typing-extensions" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/80/f0/086c442c6516195786131b8ca70488c6ef11d2f2e33c9a893576b2b0d3f7/fastapi-0.121.3.tar.gz", hash = "sha256:0055bc24fe53e56a40e9e0ad1ae2baa81622c406e548e501e717634e2dfbc40b", size = 344501, upload-time = "2025-11-19T16:53:39.243Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/96/8a/6b9ba6eb8ff3817caae83120495965d9e70afb4d6348cb120e464ee199f4/fastapi-0.127.1.tar.gz", hash = "sha256:946a87ee5d931883b562b6bada787d6c8178becee2683cb3f9b980d593206359", size = 391876, upload-time = "2025-12-26T13:04:47.075Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/98/b6/4f620d7720fc0a754c8c1b7501d73777f6ba43b57c8ab99671f4d7441eb8/fastapi-0.121.3-py3-none-any.whl", hash = "sha256:0c78fc87587fcd910ca1bbf5bc8ba37b80e119b388a7206b39f0ecc95ebf53e9", size = 109801, upload-time = "2025-11-19T16:53:37.918Z" },
+    { url = "https://files.pythonhosted.org/packages/d2/f3/a6858d147ed2645c095d11dc2440f94a5f1cd8f4df888e3377e6b5281a0f/fastapi-0.127.1-py3-none-any.whl", hash = "sha256:31d670a4f9373cc6d7994420f98e4dc46ea693145207abc39696746c83a44430", size = 112332, upload-time = "2025-12-26T13:04:45.329Z" },
 ]
 
 [package.optional-dependencies]
@@ -4513,8 +4513,8 @@ requires-dist = [
     { name = "docstring-parser", specifier = "~=0.16" },
     { name = "einops", marker = "extra == 'moondream'", specifier = "~=0.8.0" },
     { name = "fal-client", marker = "extra == 'fal'", specifier = "~=0.5.9" },
-    { name = "fastapi", marker = "extra == 'runner'", specifier = ">=0.115.6,<0.122.0" },
-    { name = "fastapi", marker = "extra == 'websocket'", specifier = ">=0.115.6,<0.122.0" },
+    { name = "fastapi", marker = "extra == 'runner'", specifier = ">=0.115.6,<0.128.0" },
+    { name = "fastapi", marker = "extra == 'websocket'", specifier = ">=0.115.6,<0.128.0" },
     { name = "faster-whisper", marker = "extra == 'whisper'", specifier = "~=1.1.1" },
     { name = "google-cloud-speech", marker = "extra == 'google'", specifier = ">=2.33.0,<3" },
     { name = "google-cloud-texttospeech", marker = "extra == 'google'", specifier = ">=2.31.0,<3" },