diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 3f5ef60..c748a0d 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==0.138.0",
+    "fastapi==0.139.2",
     "fastapi-sso==0.21.0",
     "gunicorn==26.0.0",
     "heliclockter==3.0.1",
diff --git a/backend/uv.lock b/backend/uv.lock
index 246371b..d469cac 100644
--- a/backend/uv.lock
+++ b/backend/uv.lock
@@ -440,7 +440,7 @@ 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 = "==0.138.0" },
+    { name = "fastapi", specifier = "==0.139.2" },
     { name = "fastapi-sso", specifier = "==0.21.0" },
     { name = "gunicorn", specifier = "==26.0.0" },
     { name = "heliclockter", specifier = "==3.0.1" },
@@ -639,7 +639,7 @@ wheels = [
 
 [[package]]
 name = "fastapi"
-version = "0.138.0"
+version = "0.139.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "annotated-doc" },
@@ -648,9 +648,9 @@ dependencies = [
     { name = "typing-extensions" },
     { name = "typing-inspection" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/5b/58/ff455d9fe47c60abadb34b9e05a304b1f05f5ab8000ac01565156b6f5e43/fastapi-0.138.0.tar.gz", hash = "sha256:d445a4877636ad191e7053e08c9bf98cb921a6756776848400bb773d1740c061", size = 419240, upload-time = "2026-06-20T01:18:05.259Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/cd/95/d3f0ae10836324a2eab98a52b61210ac609f08200bf4bb0dc8132d32f78a/fastapi-0.139.2.tar.gz", hash = "sha256:333145a6891e9b5b3cfceb69baf817e8240cde4d4588ae5a10bf56ffacb6255e", size = 423428, upload-time = "2026-07-16T15:06:17.912Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/6c/ff/8496d9847a5fedae775eb49460722d3efaa80487854273e9647ae876218c/fastapi-0.138.0-py3-none-any.whl", hash = "sha256:b6f54fd1bd72c80b0f899f172c61a600f6f7af9b43d4d772a018f35624048cb0", size = 126779, upload-time = "2026-06-20T01:18:03.483Z" },
+    { url = "https://files.pythonhosted.org/packages/5f/c7/cb03251d9dfb177246a9809a76f189d21df32dbd4a845951881d11323b7f/fastapi-0.139.2-py3-none-any.whl", hash = "sha256:b9ad015a835173d59865e2f5d8296fbc2b317bf56a2ba1a5bfbdd03de2fd4b1c", size = 130234, upload-time = "2026-07-16T15:06:19.557Z" },
 ]
 
 [[package]]