diff --git a/src/pydase/utils/helpers.py b/src/pydase/utils/helpers.py
index f68f995..6124d2e 100644
--- a/src/pydase/utils/helpers.py
+++ b/src/pydase/utils/helpers.py
@@ -125,7 +125,9 @@ def parse_keyed_attribute(attr_string: str) -> tuple[str, str | float | int | No
         >>> parse_keyed_attribute('attr_name')
         ("attr_name", None)
         >>> parse_keyed_attribute('dict_attr["key"]')
-        ("dict_attr", 'key')
+        ("dict_attr", "key")
+        >>> parse_keyed_attribute("dict_attr['key']")
+        ("dict_attr", "key")
         >>> parse_keyed_attribute("dict_attr["0"]")
         ("dict_attr", "0")
         >>> parse_keyed_attribute("dict_attr[0]")
@@ -139,7 +141,7 @@ def parse_keyed_attribute(attr_string: str) -> tuple[str, str | float | int | No
         attr_name, key_part = attr_string.split("[", 1)
         key_part = key_part.rstrip("]")
         # Remove quotes if present (supports both single and double quotes)
-        if key_part.startswith('"') and key_part.endswith('"'):
+        if key_part.startswith(('"', "'")) and key_part.endswith(('"', "'")):
             key = key_part[1:-1]
         elif "." in key_part:
             key = float(key_part)
diff --git a/tests/utils/test_helpers.py b/tests/utils/test_helpers.py
index e911944..dfbfb87 100644
--- a/tests/utils/test_helpers.py
+++ b/tests/utils/test_helpers.py
@@ -40,9 +40,18 @@ def test_is_property_attribute(attr_name: str, expected: bool) -> None:
         ("list_attr[2]", ("list_attr", 2)),
         ('dict_attr["2"]', ("dict_attr", "2")),
         ('dict_attr["some_key"]', ("dict_attr", "some_key")),
+        ("dict_attr['some_key']", ("dict_attr", "some_key")),
         ("dict_attr[2]", ("dict_attr", 2)),
         ("dict_attr[2.1]", ("dict_attr", 2.1)),
     ],
 )
 def test_parse_keyed_attributes(attr_name: str, expected: tuple[str, Any]) -> None:
     assert parse_keyed_attribute(attr_name) == expected
+
+
+# def test_get_nested_dict_by_path() -> None:
+#     obj = {"2.1": "foo", 2.1: "bar"}
+#     serialized_object = {
+#         "dict_attr": dump(obj=obj),
+#     }
+#     assert get_nested_dict_by_path(serialized_object, 'dict_attr["2.1"]') == {}