diff --git a/pyproject.toml b/pyproject.toml
index 017188120..e890204d6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ lambda-tests = [
     "pytest==9.1.1",
     "pytest-cov==7.1.0",
     "moto[all]==5.2.3",
-    "boto3==1.43.108",
+    "boto3==1.43.109",
     # Runtime libs provided by Klayers in production. Installing them here lets
     # tests import handlers the same way the Lambda runtime does.
     "PyJWT==2.15.0",
@@ -45,5 +45,5 @@ lambda-tests = [
 # No moto here: these tests point boto3 at the local MiniStack endpoint.
 smoke-tests = [
     "pytest==9.1.1",
-    "boto3==1.43.108",
+    "boto3==1.43.109",
 ]
diff --git a/uv.lock b/uv.lock
index a5e42ef3b..fedf91f93 100644
--- a/uv.lock
+++ b/uv.lock
@@ -99,16 +99,16 @@ wheels = [
 
 [[package]]
 name = "boto3"
-version = "1.43.108"
+version = "1.43.109"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "botocore" },
     { name = "jmespath" },
     { name = "s3transfer" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/48/59/fb93b6ebd9ad43eb9a58c7a6da51a0fe24ab0c04bc4d534a0bfc5eba7f59/boto3-1.43.108.tar.gz", hash = "sha256:03341f089158368acf83e921aca98b706095322ca52bc4c039a616940aa5ad41", size = 112682, upload-time = "2026-10-02T19:32:25.211Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/2a/80/0430e16c302b0d1a4ca3c8c69ffee9e4f8f2170d56162d2761b34fd512ba/boto3-1.43.109.tar.gz", hash = "sha256:c829bc3352e1e3922d8fe1db10b697182ac411b64ce5fc3acb0a06a29837417e", size = 112661, upload-time = "2026-10-07T15:24:51.293Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/74/e4/7e88c40e9f61888e12dac0de41a5fddc2bcd1c3992d9b28e17d915cce0df/boto3-1.43.108-py3-none-any.whl", hash = "sha256:19e9da95ef0c494e27052049a42137550e66730509bb613e76eaa30ddf9a7170", size = 140045, upload-time = "2026-10-02T19:32:23.826Z" },
+    { url = "https://files.pythonhosted.org/packages/a1/56/c83a8fdadf06f631d1a0c4d82fc8daa9e1a40f6354264fba20c186363f49/boto3-1.43.109-py3-none-any.whl", hash = "sha256:703a81baed186d31e27cf50065d25a9faeb704f009e7c56b0f002ca52a328896", size = 140044, upload-time = "2026-10-07T15:24:49.793Z" },
 ]
 
 [[package]]
@@ -694,7 +694,7 @@ forge-github-app-register = [
     { name = "uv", specifier = "==0.12.23" },
 ]
 lambda-tests = [
-    { name = "boto3", specifier = "==1.43.108" },
+    { name = "boto3", specifier = "==1.43.109" },
     { name = "cryptography", specifier = "==50.0.2" },
     { name = "hypothesis", specifier = "==6.168.5" },
     { name = "moto", extras = ["all"], specifier = "==5.2.3" },
@@ -711,7 +711,7 @@ pre-commit-image = [
     { name = "uv", specifier = "==0.12.23" },
 ]
 smoke-tests = [
-    { name = "boto3", specifier = "==1.43.108" },
+    { name = "boto3", specifier = "==1.43.109" },
     { name = "pytest", specifier = "==9.1.1" },
 ]