diff --git a/ihatemoney/forms.py b/ihatemoney/forms.py
index de9004d5..e8d437bf 100644
--- a/ihatemoney/forms.py
+++ b/ihatemoney/forms.py
@@ -189,7 +189,7 @@ class InviteForm(FlaskForm):
         for email in [email.strip() for email in form.emails.data.split(",")]:
             try:
                 email_validator.validate_email(email)
-            except email_validator.EmailNotValidError as e:
+            except email_validator.EmailNotValidError:
                 raise ValidationError(_("The email %(email)s is not valid",
                                         email=email))
 
diff --git a/ihatemoney/utils.py b/ihatemoney/utils.py
index d03e91bf..19340df8 100644
--- a/ihatemoney/utils.py
+++ b/ihatemoney/utils.py
@@ -23,8 +23,8 @@ def slugify(value):
         value = unicodedata.normalize('NFKD', value)
         if six.PY2:
             value = value.encode('ascii', 'ignore')
-    value = six.text_type(re.sub('[^\w\s-]', '', value).strip().lower())
-    return re.sub('[-\s]+', '-', value)
+    value = six.text_type(re.sub(r'[^\w\s-]', '', value).strip().lower())
+    return re.sub(r'[-\s]+', '-', value)
 
 
 class Redirect303(HTTPException, RoutingException):