diff --git a/parsons/etl/etl.py b/parsons/etl/etl.py
index 25c696f192..a1e9e99570 100644
--- a/parsons/etl/etl.py
+++ b/parsons/etl/etl.py
@@ -660,7 +660,8 @@ def unpack_nested_columns_as_rows(self, column, key="id", expand_original=False)
             if "uid" not in self.columns:
                 orig.add_column(
                     "uid",
-                    lambda row: hashlib.md5(str.encode("".join([str(x) for x in row]))).hexdigest(),
+                    lambda row: hashlib.md5(str.encode("".join([str(x) for x in row])),
+                                            usedforsecurity=False).hexdigest(),
                 )
                 orig.move_column("uid", 0)
 
@@ -675,7 +676,8 @@ def unpack_nested_columns_as_rows(self, column, key="id", expand_original=False)
             # Add unique id column by hashing all the other fields
             melted_list.add_column(
                 "uid",
-                lambda row: hashlib.md5(str.encode("".join([str(x) for x in row]))).hexdigest(),
+                lambda row: hashlib.md5(str.encode("".join([str(x) for x in row])),
+                                        usedforsecurity=False).hexdigest(),
             )
             melted_list.move_column("uid", 0)
             output = melted_list