diff --git a/poetry.lock b/poetry.lock
index 392b55005..f25911578 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -188,20 +188,20 @@ uvloop = ["uvloop (>=0.15.2)"]
 
 [[package]]
 name = "boto3"
-version = "1.34.67"
+version = "1.40.35"
 description = "The AWS SDK for Python"
 optional = false
-python-versions = ">=3.8"
+python-versions = ">=3.9"
 groups = ["dev"]
 files = [
-    {file = "boto3-1.34.67-py3-none-any.whl", hash = "sha256:473febdf2606cf36f14c470dc3ff1b986efac15f69e37eb0fd728d42749065dd"},
-    {file = "boto3-1.34.67.tar.gz", hash = "sha256:950161d438ae1bf31374f04175e5f2624a5de8109674ff80f4de5d962313072a"},
+    {file = "boto3-1.40.35-py3-none-any.whl", hash = "sha256:f4c1b01dd61e7733b453bca38b004ce030e26ee36e7a3d4a9e45a730b67bc38d"},
+    {file = "boto3-1.40.35.tar.gz", hash = "sha256:d718df3591c829bcca4c498abb7b09d64d1eecc4e5a2b6cef14b476501211b8a"},
 ]
 
 [package.dependencies]
-botocore = ">=1.34.67,<1.35.0"
+botocore = ">=1.40.35,<1.41.0"
 jmespath = ">=0.7.1,<2.0.0"
-s3transfer = ">=0.10.0,<0.11.0"
+s3transfer = ">=0.14.0,<0.15.0"
 
 [package.extras]
 crt = ["botocore[crt] (>=1.21.0,<2.0a0)"]
@@ -614,14 +614,14 @@ xray = ["mypy-boto3-xray (>=1.34.0,<1.35.0)"]
 
 [[package]]
 name = "botocore"
-version = "1.34.67"
+version = "1.40.35"
 description = "Low-level, data-driven core of boto 3."
 optional = false
-python-versions = ">=3.8"
+python-versions = ">=3.9"
 groups = ["dev"]
 files = [
-    {file = "botocore-1.34.67-py3-none-any.whl", hash = "sha256:56002d7c046ec134811dd079469692ab82919c9840ea4e1c1c373a1d228e37ae"},
-    {file = "botocore-1.34.67.tar.gz", hash = "sha256:fc094c055a6ac151820a4d8e28f7b30d03e02695ce180527520a5e219b14e8a1"},
+    {file = "botocore-1.40.35-py3-none-any.whl", hash = "sha256:c545de2cbbce161f54ca589fbb677bae14cdbfac7d5f1a27f6a620cb057c26f4"},
+    {file = "botocore-1.40.35.tar.gz", hash = "sha256:67e062752ff579c8cc25f30f9c3a84c72d692516a41a9ee1cf17735767ca78be"},
 ]
 
 [package.dependencies]
@@ -630,7 +630,7 @@ python-dateutil = ">=2.1,<3.0.0"
 urllib3 = {version = ">=1.25.4,<2.2.0 || >2.2.0,<3", markers = "python_version >= \"3.10\""}
 
 [package.extras]
-crt = ["awscrt (==0.19.19)"]
+crt = ["awscrt (==0.27.6)"]
 
 [[package]]
 name = "botocore-stubs"
@@ -2565,21 +2565,21 @@ files = [
 
 [[package]]
 name = "s3transfer"
-version = "0.10.1"
+version = "0.14.0"
 description = "An Amazon S3 Transfer Manager"
 optional = false
-python-versions = ">= 3.8"
+python-versions = ">=3.9"
 groups = ["dev"]
 files = [
-    {file = "s3transfer-0.10.1-py3-none-any.whl", hash = "sha256:ceb252b11bcf87080fb7850a224fb6e05c8a776bab8f2b64b7f25b969464839d"},
-    {file = "s3transfer-0.10.1.tar.gz", hash = "sha256:5683916b4c724f799e600f41dd9e10a9ff19871bf87623cc8f491cb4f5fa0a19"},
+    {file = "s3transfer-0.14.0-py3-none-any.whl", hash = "sha256:ea3b790c7077558ed1f02a3072fb3cb992bbbd253392f4b6e9e8976941c7d456"},
+    {file = "s3transfer-0.14.0.tar.gz", hash = "sha256:eff12264e7c8b4985074ccce27a3b38a485bb7f7422cc8046fee9be4983e4125"},
 ]
 
 [package.dependencies]
-botocore = ">=1.33.2,<2.0a.0"
+botocore = ">=1.37.4,<2.0a.0"
 
 [package.extras]
-crt = ["botocore[crt] (>=1.33.2,<2.0a.0)"]
+crt = ["botocore[crt] (>=1.37.4,<2.0a.0)"]
 
 [[package]]
 name = "setuptools"
@@ -2749,4 +2749,4 @@ files = [
 [metadata]
 lock-version = "2.1"
 python-versions = "^3.12"
-content-hash = "e29c5454e4d33ab0a8dd4e5b05ee436c78664d59d353474fa8707502ff68468d"
+content-hash = "469dc924d922c5a0441c004b8fb408fb212ba2448f6fdf0959eea028b2f5de2a"
diff --git a/pyproject.toml b/pyproject.toml
index ca90d36d1..6d7ec0786 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ nrlf-converter = {url = "https://github.com/NHSDigital/nrlf-converter/releases/d
 pytest = "^8.4.1"
 pytest-mock = "^3.12.0"
 pytest-cov = "^5.0.0"
-boto3 = "^1.34.60"
+boto3 = "^1.40.35"
 sh = "^2.0.6"
 moto = {extras = ["dynamodb", "s3"], version = "^5.1.9"}
 behave = "^1.2.6"