diff --git a/challenge-4/agent-workflow/app/pyproject.toml b/challenge-4/agent-workflow/app/pyproject.toml
index 056cd5d..40844b7 100644
--- a/challenge-4/agent-workflow/app/pyproject.toml
+++ b/challenge-4/agent-workflow/app/pyproject.toml
@@ -9,7 +9,7 @@ dependencies = [
     "agent-framework-azure-ai>=0.1.0",
     "azure-identity>=1.15.0",
     "azure-cosmos>=4.5.0",
-    "python-dotenv>=1.0.0",
+    "python-dotenv>=1.2.2",
     "opentelemetry-distro>=0.59b0",
     "opentelemetry-exporter-otlp-proto-grpc>=1.38.0",
     "opentelemetry-instrumentation-fastapi>=0.59b0",
diff --git a/challenge-4/agent-workflow/app/uv.lock b/challenge-4/agent-workflow/app/uv.lock
index 9436461..a7db601 100644
--- a/challenge-4/agent-workflow/app/uv.lock
+++ b/challenge-4/agent-workflow/app/uv.lock
@@ -918,7 +918,7 @@ requires-dist = [
     { name = "opentelemetry-distro", specifier = ">=0.59b0" },
     { name = "opentelemetry-exporter-otlp-proto-grpc", specifier = ">=1.38.0" },
     { name = "opentelemetry-instrumentation-fastapi", specifier = ">=0.59b0" },
-    { name = "python-dotenv", specifier = ">=1.0.0" },
+    { name = "python-dotenv", specifier = ">=1.2.2" },
 ]
 
 [[package]]
@@ -2318,11 +2318,11 @@ wheels = [
 
 [[package]]
 name = "python-dotenv"
-version = "1.2.1"
+version = "1.2.2"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/f0/26/19cadc79a718c5edbec86fd4919a6b6d3f681039a2f6d66d14be94e75fb9/python_dotenv-1.2.1.tar.gz", hash = "sha256:42667e897e16ab0d66954af0e60a9caa94f0fd4ecf3aaf6d2d260eec1aa36ad6", size = 44221, upload-time = "2025-10-26T15:12:10.434Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/82/ed/0301aeeac3e5353ef3d94b6ec08bbcabd04a72018415dcb29e588514bba8/python_dotenv-1.2.2.tar.gz", hash = "sha256:2c371a91fbd7ba082c2c1dc1f8bf89ca22564a087c2c287cd9b662adde799cf3", size = 50135, upload-time = "2026-03-01T16:00:26.196Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/14/1b/a298b06749107c305e1fe0f814c6c74aea7b2f1e10989cb30f544a1b3253/python_dotenv-1.2.1-py3-none-any.whl", hash = "sha256:b81ee9561e9ca4004139c6cbba3a238c32b03e4894671e181b671e8cb8425d61", size = 21230, upload-time = "2025-10-26T15:12:09.109Z" },
+    { url = "https://files.pythonhosted.org/packages/0b/d7/1959b9648791274998a9c3526f6d0ec8fd2233e4d4acce81bbae76b44b2a/python_dotenv-1.2.2-py3-none-any.whl", hash = "sha256:1d8214789a24de455a8b8bd8ae6fe3c6b69a5e3d64aa8a8e5d68e694bbcb285a", size = 22101, upload-time = "2026-03-01T16:00:25.09Z" },
 ]
 
 [[package]]