diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 172d162..cde3040 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -6,7 +6,7 @@ requires-python = ">=3.11"
 dependencies = [
   "alembic>=1.13.3",
   "authlib>=1.6.5,<1.8",
-  "fastapi>=0.115.0",
+  "fastapi>=0.140.5",
   "httpx>=0.27.2",
   "opentelemetry-api>=1.31.0,<2",
   "opentelemetry-exporter-otlp-proto-http>=1.31.0,<2",
@@ -23,7 +23,7 @@ dependencies = [
   "python-dotenv>=1.0.1",
   "redis>=5.0.8",
   "sqlalchemy>=2.0.35",
-  "uvicorn[standard]>=0.30.6",
+  "uvicorn[standard]>=0.51.0",
 ]
 
 [project.optional-dependencies]
diff --git a/backend/uv.lock b/backend/uv.lock
index 85d8e02..693ffe1 100644
--- a/backend/uv.lock
+++ b/backend/uv.lock
@@ -151,7 +151,7 @@ dev = [
 requires-dist = [
     { name = "alembic", specifier = ">=1.13.3" },
     { name = "authlib", specifier = ">=1.6.5,<1.8" },
-    { name = "fastapi", specifier = ">=0.115.0" },
+    { name = "fastapi", specifier = ">=0.140.5" },
     { name = "httpx", specifier = ">=0.27.2" },
     { name = "mypy", marker = "extra == 'dev'", specifier = ">=1.11.2" },
     { name = "opentelemetry-api", specifier = ">=1.31.0,<2" },
@@ -174,7 +174,7 @@ requires-dist = [
     { name = "redis", specifier = ">=5.0.8" },
     { name = "ruff", marker = "extra == 'dev'", specifier = ">=0.6.9" },
     { name = "sqlalchemy", specifier = ">=2.0.35" },
-    { name = "uvicorn", extras = ["standard"], specifier = ">=0.30.6" },
+    { name = "uvicorn", extras = ["standard"], specifier = ">=0.51.0" },
 ]
 provides-extras = ["dev"]
 
@@ -592,7 +592,7 @@ wheels = [
 
 [[package]]
 name = "fastapi"
-version = "0.139.0"
+version = "0.140.5"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "annotated-doc" },
@@ -601,9 +601,9 @@ dependencies = [
     { name = "typing-extensions" },
     { name = "typing-inspection" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/d3/af/a5f50ccfa659ec1802cb4ca842c23f06d906a8cc9aef6016a2caeea3d4ed/fastapi-0.139.0.tar.gz", hash = "sha256:99ab7b2d92223c76d6cf10757ab3f89d45b38267fc20b2a136cf02f6beac3145", size = 423016, upload-time = "2026-07-01T16:35:33.436Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/2b/f9/51e0ce9abbbca78ca57ac9a0cac1851387b3ac4650d1559bd69eeeff11c0/fastapi-0.140.5.tar.gz", hash = "sha256:db294174362b7f65911cb51855e20e8ff0b5eb588407c611fe77d498938f3ea8", size = 421569, upload-time = "2026-07-27T16:02:55.196Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/9e/7c/8e3c6ad324ea5cb36604fc3f968554887891c316d9dfde57761611d907ad/fastapi-0.139.0-py3-none-any.whl", hash = "sha256:cf15e1e9e667ddb0ad63811e60bd11390d1aac838ca4a7a23f421807b2308189", size = 130339, upload-time = "2026-07-01T16:35:32.19Z" },
+    { url = "https://files.pythonhosted.org/packages/8a/7f/121bf6fb72e845013a83f96e697bbd24c6fbe41503fff8c6f83f02e300ae/fastapi-0.140.5-py3-none-any.whl", hash = "sha256:82e7a988a801d8d71e712cb7d12ebb5c87c2e74bccb104f5741cce46a742f806", size = 131034, upload-time = "2026-07-27T16:02:53.555Z" },
 ]
 
 [[package]]