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-rw-r--r--python/fatcat_web/forms.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/python/fatcat_web/forms.py b/python/fatcat_web/forms.py
index dd322cff..377e35aa 100644
--- a/python/fatcat_web/forms.py
+++ b/python/fatcat_web/forms.py
@@ -91,7 +91,7 @@ class ReleaseEntityForm(EntityEditForm):
[validators.Optional(True)])
#release_year
doi = StringField('DOI',
- [validators.Regexp('^10\..*\/.*', message="DOI must be valid"),
+ [validators.Regexp(r'^10\..*\/.*', message="DOI must be valid"),
validators.Optional(True)])
wikidata_qid = StringField('Wikidata QID')
isbn13 = StringField('ISBN-13')