diff --git a/bookwyrm/importers/importer.py b/bookwyrm/importers/importer.py
index db13b652..ca63ae4a 100644
--- a/bookwyrm/importers/importer.py
+++ b/bookwyrm/importers/importer.py
@@ -25,7 +25,7 @@ class Importer:
         ("title", ["title"]),
         ("authors", ["author", "authors", "primary author"]),
         ("isbn_10", ["isbn10", "isbn"]),
-        ("isbn_13", ["isbn13", "isbn"]),
+        ("isbn_13", ["isbn13", "isbn", "isbns"]),
         ("shelf", ["shelf", "exclusive shelf", "read status"]),
         ("review_name", ["review name"]),
         ("review_body", ["my review", "review"]),
diff --git a/bookwyrm/importers/librarything_import.py b/bookwyrm/importers/librarything_import.py
index d6426de6..cff6ba7d 100644
--- a/bookwyrm/importers/librarything_import.py
+++ b/bookwyrm/importers/librarything_import.py
@@ -12,10 +12,12 @@ class LibrarythingImporter(Importer):
 
     def normalize_row(self, entry, mappings):  # pylint: disable=no-self-use
         """use the dataclass to create the formatted row of data"""
-        normalized = {k: entry.get(v) for k, v in mappings.items()}
-        for date_field in self.date_fields:
-            date = normalized[date_field]
-            normalized[date_field] = re.sub(r"\[|\]", "", date)
+        remove_brackets = lambda v: re.sub(r"\[|\]", "", v) if v else None
+        normalized = {
+            k: remove_brackets(entry.get(v)) for k, v in mappings.items()
+        }
+        isbn_13 = normalized["isbn_13"].split(', ')
+        normalized["isbn_13"] = isbn_13[1] if len(isbn_13) > 0 else None
         return normalized
 
     def get_shelf(self, normalized_row):
diff --git a/bookwyrm/tests/importers/test_librarything_import.py b/bookwyrm/tests/importers/test_librarything_import.py
index 804118ef..f5d8d669 100644
--- a/bookwyrm/tests/importers/test_librarything_import.py
+++ b/bookwyrm/tests/importers/test_librarything_import.py
@@ -56,6 +56,9 @@ class LibrarythingImport(TestCase):
         self.assertEqual(len(import_items), 3)
         self.assertEqual(import_items[0].index, 0)
         self.assertEqual(import_items[0].data["Book Id"], "5498194")
+        self.assertEqual(import_items[0].normalized_data["isbn_13"], "9782070291342")
+        self.assertEqual(import_items[0].normalized_data["isbn_10"], "2070291340")
+
         self.assertEqual(import_items[1].index, 1)
         self.assertEqual(import_items[1].data["Book Id"], "5015319")
         self.assertEqual(import_items[2].index, 2)