diff --git a/pyproject.toml b/pyproject.toml
index 6dd9cc9..ee716a3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,10 +34,10 @@ dependencies = [
 ]
 
 [project.optional-dependencies]
-s3 = ["boto3==1.34.6"]
-aws = ["boto3==1.34.6"]  # Alias for s3 for backward compatibility
+s3 = ["boto3==1.40.50"]
+aws = ["boto3==1.40.50"]  # Alias for s3 for backward compatibility
 vault = ["hvac==1.2.1"]
-all = ["boto3==1.34.6", "hvac==1.2.1"]
+all = ["boto3==1.40.50", "hvac==1.2.1"]
 dev = [
     "pytest==8.4.2",
     "pytest-cov==7.0.0",
@@ -48,7 +48,7 @@ dev = [
     "flake8==7.3.0",
     "mypy==1.18.2",
     "types-PyYAML==6.0.12.20250915",
-    "boto3==1.34.6",
+    "boto3==1.40.50",
     "hvac==1.2.1",
     "bump-my-version==1.2.4",
     "build==1.3.0",