diff --git a/searx/settings.yml b/searx/settings.yml
index c6f80533..e41b84c1 100644
--- a/searx/settings.yml
+++ b/searx/settings.yml
@@ -408,7 +408,7 @@ engines:
 
   - name : library genesis
     engine : xpath
-    search_url : http://libgen.io/search.php?req={query}
+    search_url : https://libgen.is/search.php?req={query}
     url_xpath : //a[contains(@href,"bookfi.net")]/@href
     title_xpath : //a[contains(@href,"book/")]/text()[1]
     content_xpath : //td/a[1][contains(@href,"=author")]/text()
@@ -464,7 +464,7 @@ engines:
   - name : openairedatasets
     engine : json_engine
     paging : True
-    search_url : http://api.openaire.eu/search/datasets?format=json&page={pageno}&size=10&title={query}
+    search_url : https://api.openaire.eu/search/datasets?format=json&page={pageno}&size=10&title={query}
     results_query : response/results/result
     url_query : metadata/oaf:entity/oaf:result/children/instance/webresource/url/$
     title_query : metadata/oaf:entity/oaf:result/title/$
@@ -476,7 +476,7 @@ engines:
   - name : openairepublications
     engine : json_engine
     paging : True
-    search_url : http://api.openaire.eu/search/publications?format=json&page={pageno}&size=10&title={query}
+    search_url : https://api.openaire.eu/search/publications?format=json&page={pageno}&size=10&title={query}
     results_query : response/results/result
     url_query : metadata/oaf:entity/oaf:result/children/instance/webresource/url/$
     title_query : metadata/oaf:entity/oaf:result/title/$
@@ -812,7 +812,7 @@ locales:
 doi_resolvers :
   oadoi.org : 'https://oadoi.org/'
   doi.org : 'https://doi.org/'
-  doai.io  : 'http://doai.io/'
-  sci-hub.tw : 'http://sci-hub.tw/'
+  doai.io  : 'https://doai.io/'
+  sci-hub.tw : 'https://sci-hub.tw/'
 
 default_doi_resolver : 'oadoi.org'
diff --git a/searx/settings_robot.yml b/searx/settings_robot.yml
index 63580904..25f229e5 100644
--- a/searx/settings_robot.yml
+++ b/searx/settings_robot.yml
@@ -43,7 +43,7 @@ locales:
 doi_resolvers :
   oadoi.org : 'https://oadoi.org/'
   doi.org : 'https://doi.org/'
-  doai.io  : 'http://doai.io/'
-  sci-hub.tw : 'http://sci-hub.tw/'
+  doai.io  : 'https://doai.io/'
+  sci-hub.tw : 'https://sci-hub.tw/'
 
 default_doi_resolver : 'oadoi.org'