diff --git a/ckanext/d4science/helpers.py b/ckanext/d4science/helpers.py
index 866479d..327b840 100644
--- a/ckanext/d4science/helpers.py
+++ b/ckanext/d4science/helpers.py
@@ -10,7 +10,6 @@ from ckanext.d4science.d4sdiscovery.d4s_namespaces_controller import D4S_Namespa
 from ckanext.d4science.d4sdiscovery.d4s_namespaces_extras_util import D4S_Namespaces_Extra_Util
 from ckanext.d4science.qrcodelink.generate_qrcode import D4S_QrCode
 import urllib.request, urllib.error
-from urllib.parse import quote
 
 from ckan.common import (
     _, ungettext, g, c, request, session, json, OrderedDict