diff --git a/README.md b/README.md
index cd7a5fc..377cc22 100644
--- a/README.md
+++ b/README.md
@@ -43,6 +43,11 @@ There is a `columns` module available, providing constans that define the column
 
 ## Avaliable public functions:
 
+All public functions return a [pandas DataFrame][pandas] object.
+
+Be aware that some columns might contain no values. This is depending on the parsing 
+method (xml or csv) and if a parameters file could be found or not.
+
  - **parse_folder(path_to_folder)**
    Tries the `parse_xml_folder()` function first and if an error occurs, 
    it falls back to the `parse_csv_folder()`
@@ -88,3 +93,4 @@ To generate the documentation pages use `make docs` or `make serve-docs` for
 starting a webserver with the generated documentation
 
 [sensospot]: https://www.miltenyi-imaging.com/products/sensospot
+[pandas]: https://pandas.pydata.org/docs/reference/frame.html
\ No newline at end of file
diff --git a/src/sensospot_parser/__init__.py b/src/sensospot_parser/__init__.py
index 135f9ec..69585b9 100644
--- a/src/sensospot_parser/__init__.py
+++ b/src/sensospot_parser/__init__.py
@@ -3,7 +3,7 @@
 Parsing the numerical output from Sensovations Sensospot image analysis.
 """
 
-__version__ = "2.0.1"
+__version__ = "2.0.2"
 
 import logging
 import pathlib