diff --git a/components/polylith/libs/lock_files.py b/components/polylith/libs/lock_files.py
index fea2f7a..dabf229 100644
--- a/components/polylith/libs/lock_files.py
+++ b/components/polylith/libs/lock_files.py
@@ -104,10 +104,19 @@ def get_workspace_enabled_lock_file_data(
     return data if members else {}
 
 
+def pick_package_sub_deps(package: dict) -> list:
+    package_sub_deps = package.get("dependencies", [])
+
+    package_optional_deps_section = package.get("optional-dependencies", {})
+    package_optional_deps: List[dict] = sum(package_optional_deps_section.values(), [])
+
+    return package_sub_deps + package_optional_deps
+
+
 def pick_packages(data: dict, name: str) -> list:
     package = next(p for p in data["package"] if p["name"] == name)
 
-    package_sub_deps = package.get("dependencies", [])
+    package_sub_deps = pick_package_sub_deps(package)
     nested_package_deps = [pick_packages(data, p["name"]) for p in package_sub_deps]
 
     flattened = sum(nested_package_deps, [])
diff --git a/projects/poetry_polylith_plugin/pyproject.toml b/projects/poetry_polylith_plugin/pyproject.toml
index 81da0dc..c4729d7 100644
--- a/projects/poetry_polylith_plugin/pyproject.toml
+++ b/projects/poetry_polylith_plugin/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "poetry-polylith-plugin"
-version = "1.35.0"
+version = "1.36.0"
 description = "A Poetry plugin that adds tooling support for the Polylith Architecture"
 authors = ["David Vujic"]
 homepage = "https://davidvujic.github.io/python-polylith-docs/"
diff --git a/projects/polylith_cli/pyproject.toml b/projects/polylith_cli/pyproject.toml
index 730d49c..b3afb54 100644
--- a/projects/polylith_cli/pyproject.toml
+++ b/projects/polylith_cli/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "polylith-cli"
-version = "1.24.0"
+version = "1.25.0"
 description = "Python tooling support for the Polylith Architecture"
 authors = ['David Vujic']
 homepage = "https://davidvujic.github.io/python-polylith-docs/"
diff --git a/test/components/polylith/libs/test_parse_lock_file.py b/test/components/polylith/libs/test_parse_lock_file.py
index aea8c0e..df3a5a7 100644
--- a/test/components/polylith/libs/test_parse_lock_file.py
+++ b/test/components/polylith/libs/test_parse_lock_file.py
@@ -128,3 +128,36 @@ def test_parse_contents_of_uv_workspaces_aware_lock_file(setup):
     assert non_existing == {}
 
     assert gcp_libs_from_normalized_name == expected_gcp_libs
+
+
+def test_parse_contents_of_uv_workspaces_aware_lock_file_with_optional_dependencies(
+    setup,
+):
+    expected_regular = {
+        "fastapi": "0.106.0",
+        "anyio": "3.7.1",
+        "exceptiongroup": "1.2.2",
+        "idna": "3.7",
+        "sniffio": "1.3.1",
+        "pydantic": "2.8.2",
+        "annotated-types": "0.7.0",
+        "pydantic-core": "2.20.1",
+        "typing-extensions": "4.12.2",
+        "starlette": "0.27.0",
+        "uvicorn": "0.25.0",
+        "click": "8.1.7",
+        "colorama": "0.4.6",
+        "h11": "0.14.0",
+    }
+
+    expected_optionals = {
+        "requests": "2.32.3",
+        "certifi": "2024.12.14",
+        "charset-normalizer": "3.4.1",
+        "urllib3": "2.3.0",
+    }
+    expected = {**expected_regular, **expected_optionals}
+
+    my_fastapi_libs = _extract_workspace_member_libs("my-fastapi-project")
+
+    assert my_fastapi_libs == expected
diff --git a/test/test_data/uv_workspaces b/test/test_data/uv_workspaces
index 4231a80..4ee5f68 100644
--- a/test/test_data/uv_workspaces
+++ b/test/test_data/uv_workspaces
@@ -32,11 +32,19 @@ dependencies = [
 name = "blinker"
 version = "1.8.2"
 
+[[package]]
+name = "certifi"
+version = "2024.12.14"
+
+[[package]]
+name = "charset-normalizer"
+version = "3.4.1"
+
 [[package]]
 name = "click"
 version = "8.1.7"
 dependencies = [
-    { name = "colorama", marker = "platform_system == 'Windows'" },
+    { name = "colorama", marker = "sys_platform == 'win32'" },
 ]
 
 [[package]]
@@ -49,7 +57,6 @@ dependencies = [
 [[package]]
 name = "colorama"
 version = "0.4.6"
-source = { registry = "https://pypi.org/simple" }
 
 [[package]]
 name = "confluent-kafka"
@@ -65,7 +72,6 @@ dependencies = [
 [[package]]
 name = "deprecation"
 version = "2.1.0"
-source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "packaging" },
 ]
@@ -103,7 +109,7 @@ dependencies = [
     { name = "click" },
     { name = "cloudevents" },
     { name = "flask" },
-    { name = "gunicorn", marker = "platform_system != 'Windows'" },
+    { name = "gunicorn", marker = "sys_platform != 'win32'" },
     { name = "watchdog" },
 ]
 
@@ -186,6 +192,11 @@ dependencies = [
     { name = "uvicorn" },
 ]
 
+[package.optional-dependencies]
+opt = [
+    { name = "requests" },
+]
+
 [[package]]
 name = "my-gcp-function-project"
 version = "0.1.0"
@@ -266,6 +277,16 @@ dependencies = [
     { name = "uvicorn" },
 ]
 
+[[package]]
+name = "requests"
+version = "2.32.3"
+dependencies = [
+    { name = "certifi" },
+    { name = "charset-normalizer" },
+    { name = "idna" },
+    { name = "urllib3" },
+]
+
 [[package]]
 name = "rich"
 version = "13.8.0"
@@ -324,6 +345,10 @@ dependencies = [
 name = "typing-extensions"
 version = "4.12.2"
 
+[[package]]
+name = "urllib3"
+version = "2.3.0"
+
 [[package]]
 name = "uvicorn"
 version = "0.25.0"