diff --git a/src/Jackett.Common/Definitions/sktorrent-org.yml b/src/Jackett.Common/Definitions/sktorrent-org.yml
index dd8443636..6c18ffc2f 100644
--- a/src/Jackett.Common/Definitions/sktorrent-org.yml
+++ b/src/Jackett.Common/Definitions/sktorrent-org.yml
@@ -7,6 +7,8 @@ type: semi-private
 encoding: UTF-8
 links:
   - https://sktorrent.org/
+certificates:
+  - ed5e7376c25b53e049dca071527f8ef8f9e0870e # expired 29 January 2021
 
 caps:
   categorymappings: