diff --git a/read_datasheet.py b/read_datasheet.py
index f19d30f..d22a51c 100755
--- a/read_datasheet.py
+++ b/read_datasheet.py
@@ -236,7 +236,7 @@ def flatten(tables):
 
             # if the item has at least two commas in it, split it
             if tables[table][key].count(',') >= 2:
-                out[fullkeyname] = map(lambda x: x.strip(), tables[table][key].split(","))
+                out[fullkeyname] = list(map(lambda x: x.strip(), tables[table][key].split(",")))
                 print("\"" + keyname + "\":", "\"" + str(out[fullkeyname]) + "\",")