diff --git a/oml/meta/utils.py b/oml/meta/utils.py
index b47e4ec..e8a92f8 100644
--- a/oml/meta/utils.py
+++ b/oml/meta/utils.py
@@ -23,7 +23,7 @@ def normalize_isbn(value):
 def find_isbns(text):
     if isinstance(text, bytes):
         text = text.decode()
-    matches = re.compile('\d[\d\-X\u2013\ ]+').findall(text)
+    matches = re.compile('\d[\d\-X\u2013–\ ]+').findall(text)
     matches = [normalize_isbn(value) for value in matches]
     matches = [to_isbn13(value) for value in matches]
     matches = list(set([value for value in matches if value]))