diff --git a/pyproject.toml b/pyproject.toml
index 5a4e5f1..a0906ee 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ description = "High-performance async OCR pipeline using DeepSeek-VL and PyMuPDF
 readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
-    "fastapi==0.136.1",
+    "fastapi==0.139.0",
     "uvicorn[standard]==0.47.0",
     "openai==2.37.0",     # Used for the async vLLM client
     "pymupdf==1.27.2.3",    # Replaces pdf2image/poppler
diff --git a/uv.lock b/uv.lock
index 39d3533..bc707b0 100644
--- a/uv.lock
+++ b/uv.lock
@@ -176,7 +176,7 @@ wheels = [
 
 [[package]]
 name = "fastapi"
-version = "0.136.1"
+version = "0.139.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "annotated-doc" },
@@ -185,9 +185,9 @@ dependencies = [
     { name = "typing-extensions" },
     { name = "typing-inspection" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/5d/45/c130091c2dfa061bbfe3150f2a5091ef1adf149f2a8d2ae769ecaf6e99a2/fastapi-0.136.1.tar.gz", hash = "sha256:7af665ad7acfa0a3baf8983d393b6b471b9da10ede59c60045f49fbc89a0fa7f", size = 397448, upload-time = "2026-04-23T16:49:44.046Z" }
+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" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/5a/ff/2e4eca3ade2c22fe1dea7043b8ee9dabe47753349eb1b56a202de8af6349/fastapi-0.136.1-py3-none-any.whl", hash = "sha256:a6e9d7eeada96c93a4d69cb03836b44fa34e2854accb7244a1ece36cd4781c3f", size = 117683, upload-time = "2026-04-23T16:49:42.437Z" },
+    { 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" },
 ]
 
 [[package]]
@@ -406,7 +406,7 @@ dependencies = [
 
 [package.metadata]
 requires-dist = [
-    { name = "fastapi", specifier = "==0.136.1" },
+    { name = "fastapi", specifier = "==0.139.0" },
     { name = "jinja2", specifier = "==3.1.6" },
     { name = "openai", specifier = "==2.37.0" },
     { name = "pillow", specifier = "==12.2.0" },