diff --git a/nibio_postprocessing/las_to_pandas.py b/nibio_postprocessing/las_to_pandas.py
index 08acfa2e8222d7d6c2836ba2e49d1a80bc38954e..e4945429b0ccfff2fe7fe03513a7af9337d8d705 100644
--- a/nibio_postprocessing/las_to_pandas.py
+++ b/nibio_postprocessing/las_to_pandas.py
@@ -2,6 +2,8 @@ import numpy as np
 import pandas as pd
 import laspy
 
+# works with laspy 2.1.2
+
 def las_to_pandas(las_file_path, csv_file_path, save_csv=True):
     """
     Reads a LAS file and converts it to a pandas dataframe, then saves it to a CSV file.
diff --git a/nibio_postprocessing/pandas_to_las.py b/nibio_postprocessing/pandas_to_las.py
index 01d6077d0ca476300c5cf40f712e84fc67da8e6d..71e7e5ba1193b31b47a011afd7426a800976c10a 100644
--- a/nibio_postprocessing/pandas_to_las.py
+++ b/nibio_postprocessing/pandas_to_las.py
@@ -2,6 +2,7 @@ import laspy
 import pandas as pd
 import numpy as np
 
+# works with laspy 2.1.2
 
 def pandas_to_las(csv, las_file_path, csv_file_provided=True, verbose=False):
     """