@@ -127,7 +127,7 @@ engines:
127127 - name : crossref
128128 engine : json_engine
129129 paging : True
130− search_url : http://search.crossref.org/dois?q={query}&page={pageno}
130+ search_url : https://search.crossref.org/dois?q={query}&page={pageno}
131131 url_query : doi
132132 title_query : title
133133 content_query : fullCitation