diff --git a/internal/indexer/definitions/immortalseed.yaml b/internal/indexer/definitions/immortalseed.yaml
index eb33ae4..5776c3a 100644
--- a/internal/indexer/definitions/immortalseed.yaml
+++ b/internal/indexer/definitions/immortalseed.yaml
@@ -17,7 +17,7 @@ settings:
     type: secret
     label: Passkey
     help: "Go to https://immortalseed.me/getrss.php to get the RSS feed link and extract passkey from secret_key"
-    regex: [\?&;]secret_key=([\da-fA-F]{32})
+    regex: '[\?&;]secret_key=([\da-fA-F]{32})'
 
 irc:
   network: ImmortalSeed