diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index cd33a77d3..f3914b314 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -11,7 +11,7 @@ dependencies = [
     "bcrypt==5.0.0",
     "click==8.4.0",
     "databases[asyncpg]==0.9.0",
-    "fastapi==0.139.0",
+    "fastapi==0.140.0",
     "fastapi-sso==0.21.0",
     "gunicorn==26.0.0",
     "heliclockter==3.0.1",
diff --git a/backend/uv.lock b/backend/uv.lock
index 7b6a3de78..cd83326e7 100644
--- a/backend/uv.lock
+++ b/backend/uv.lock
@@ -464,7 +464,7 @@ requires-dist = [
     { name = "bcrypt", specifier = "==5.0.0" },
     { name = "click", specifier = "==8.4.0" },
     { name = "databases", extras = ["asyncpg"], specifier = "==0.9.0" },
-    { name = "fastapi", specifier = "==0.139.0" },
+    { name = "fastapi", specifier = "==0.140.0" },
     { name = "fastapi-sso", specifier = "==0.21.0" },
     { name = "gunicorn", specifier = "==26.0.0" },
     { name = "heliclockter", specifier = "==3.0.1" },
@@ -663,7 +663,7 @@ wheels = [
 
 [[package]]
 name = "fastapi"
-version = "0.139.0"
+version = "0.140.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "annotated-doc" },
@@ -672,9 +672,9 @@ 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/0d/fb/fd7671137d9fa3df1d93a2f5111eb982709201724b29f211e4beb2d58688/fastapi-0.140.0.tar.gz", hash = "sha256:f338951b82fd74ca8f843163aec43ea1a1ce84d515415a50fa98fa25572a5544", size = 420968, upload-time = "2026-07-24T21:16:41.187Z" }
 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/eb/76/6d9e25ad88da9d3ff744bcdbec4736e38c2288611d43f673a5d9bfa27c07/fastapi-0.140.0-py3-none-any.whl", hash = "sha256:e951c0a0d9540bf5d9a2a9e078fd415da2ab7e312d435139e7d9e2e7fe9f0b23", size = 130863, upload-time = "2026-07-24T21:16:42.89Z" },
 ]
 
 [[package]]