diff --git a/backend/api/pyproject.toml b/backend/api/pyproject.toml
index 3f8a8d64..3392f625 100644
--- a/backend/api/pyproject.toml
+++ b/backend/api/pyproject.toml
@@ -9,7 +9,7 @@ description = "REST API endpoint provider for presigned S3 upload and archiving
 readme = "README.md"
 requires-python = "==3.13.*"
 dependencies = [
-    "boto3>=1.36.6",
+    "boto3>=1.43.37",
     "fastapi[standard]>=0.115.7",
     "gunicorn>=23.0.0",
     "httpx>=0.28.1",
diff --git a/backend/api/uv.lock b/backend/api/uv.lock
index 4550e815..d6e18ddc 100644
--- a/backend/api/uv.lock
+++ b/backend/api/uv.lock
@@ -112,7 +112,7 @@ lint = [
 
 [package.metadata]
 requires-dist = [
-    { name = "boto3", specifier = ">=1.36.6" },
+    { name = "boto3", specifier = ">=1.43.37" },
     { name = "fastapi", extras = ["standard"], specifier = ">=0.115.7" },
     { name = "gunicorn", specifier = ">=23.0.0" },
     { name = "httpx", specifier = ">=0.28.1" },
@@ -240,30 +240,30 @@ wheels = [
 
 [[package]]
 name = "boto3"
-version = "1.43.26"
+version = "1.43.37"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "botocore" },
     { name = "jmespath" },
     { name = "s3transfer" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/e8/6a/fede22427b4e8e56bae102de50351f1a02519be86f8c8dd5347c377cfceb/boto3-1.43.26.tar.gz", hash = "sha256:33f027b7911dffe84f4896b66024c228eb856f4cf8c1ff3465be0eae1f413731", size = 113143, upload-time = "2026-06-09T19:34:20.381Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/fa/8b/281ca08c796322a36a639b76c714dc4c4323cab4563a492e6a923aa5f15d/boto3-1.43.37.tar.gz", hash = "sha256:cf7e75963229b337d1b0e37c46de6f3c2c2290d186157729c8e7afb12909bfc0", size = 112674, upload-time = "2026-06-29T20:29:39.273Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/c9/39/06d683934d94972c070179952746a57adff5c1851e2396d505a9b8cd9754/boto3-1.43.26-py3-none-any.whl", hash = "sha256:7c88bfbde6abcf062d04ac410a1cf4eaf8675f025f35f3ad9accc9b0224ce6b9", size = 140537, upload-time = "2026-06-09T19:34:17.812Z" },
+    { url = "https://files.pythonhosted.org/packages/e2/48/c740abb7ba90d89ef63cf766c8e07d72e6422b3cf68aa4dccf0a83efed93/boto3-1.43.37-py3-none-any.whl", hash = "sha256:f409f931e836f2f24e168e8f93901010cb8055c7f2ddcfcfbd72b25f8c4e306c", size = 140032, upload-time = "2026-06-29T20:29:36.409Z" },
 ]
 
 [[package]]
 name = "botocore"
-version = "1.43.26"
+version = "1.43.41"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "jmespath" },
     { name = "python-dateutil" },
     { name = "urllib3" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/76/ba/aa37cd4e72aa8b70fdb93f47129ef3b79887edcfb343bd41df2783a72f12/botocore-1.43.26.tar.gz", hash = "sha256:fd9280ac868194afcee59c7def62e0031fb4b599f7ef85360d30c7e42357c1dc", size = 15497173, upload-time = "2026-06-09T19:34:07.37Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/6a/a1/48a0f38b0cac8196764607c0bca7e3ca50d3cffc825087b743d3635413f2/botocore-1.43.41.tar.gz", hash = "sha256:27627d79af0df7dcb7ecf78d8d3d1310da09a5e9460be30bf759f1c2ed095ee8", size = 15647567, upload-time = "2026-07-06T19:39:27.119Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/be/e6/5a5ec1033613e7812e5b19ec8c2a1889834fde336d8812d53019eac6e04a/botocore-1.43.26-py3-none-any.whl", hash = "sha256:eeb92265bae289555182a46341c998a656ab49c0dbdb762c65b30fe354fcc9e8", size = 15183593, upload-time = "2026-06-09T19:34:03.012Z" },
+    { url = "https://files.pythonhosted.org/packages/61/4f/19e0b97ce1801c66a4d1d35117f36240aa20f864338f093fccc23873a231/botocore-1.43.41-py3-none-any.whl", hash = "sha256:0cc6e79b30a2a98374f16a31cd9c7a9106a51b60650bd8c34cc8223f58ae6b8d", size = 15331199, upload-time = "2026-07-06T19:39:23.694Z" },
 ]
 
 [[package]]
@@ -1767,14 +1767,14 @@ wheels = [
 
 [[package]]
 name = "s3transfer"
-version = "0.18.0"
+version = "0.19.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "botocore" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/e0/1f/12417f7f493fc45e1f9fd5d4a9b6c125cf8d2cf3f8ddbdfab3e76406e9d6/s3transfer-0.18.0.tar.gz", hash = "sha256:3760b8b7ec1315da54048b2d626276732bee4300d054d492d4e1d43e20d4ecbd", size = 160560, upload-time = "2026-05-28T19:39:09.124Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/f6/94/dcdaeb1713cab9c84def276cfac7388b17c7d9855bbcfe88d77e4dbafd44/s3transfer-0.19.0.tar.gz", hash = "sha256:ce436931687addc4c1712d52d40b32f53e88315723f107ffa20ba82b05a0f685", size = 165171, upload-time = "2026-06-16T19:44:51.599Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/2b/58/a58fc997655386daa2e25784e30c288aa3e3819e401f77029ee4899fb55a/s3transfer-0.18.0-py3-none-any.whl", hash = "sha256:239c13b09e65ad0346e1be7348b8a202dcad44ac7ea7c6eb858fc881dce739b6", size = 88572, upload-time = "2026-05-28T19:39:07.999Z" },
+    { url = "https://files.pythonhosted.org/packages/46/5f/4c174edad94f82de888ac00a5ddd8d07b35609b6c94f0bdf4d74af57703e/s3transfer-0.19.0-py3-none-any.whl", hash = "sha256:777cc2415536f1debadb5c2ef7779275d0fc0fe0e042411cdd6caebeb2685262", size = 90101, upload-time = "2026-06-16T19:44:50.439Z" },
 ]
 
 [[package]]