diff --git a/probabilistic-analysis/csv_to_shp.py b/probabilistic-analysis/csv_to_shp.py
index 0cb0096..3b36b23 100644
--- a/probabilistic-analysis/csv_to_shp.py
+++ b/probabilistic-analysis/csv_to_shp.py
@@ -67,7 +67,7 @@ for f in file_list:
             east, north = g.from_chainage(ch)
             row['easting'] = east.round(3)
             row['northing'] = north.round(3)
-            df = df.append(row, ignore_index=True)
+            df = pd.concat([df, pd.DataFrame([row])])
 
 # Convert floats to int
 for col in ['block', 'profile', 'year']: