diff --git a/domains.json b/domains.json
index bde044132f6a9677c7dacd16daccda00ef94690f..9087746abe7118b8ac2b60838679260f5b4970a9 100644
--- a/domains.json
+++ b/domains.json
@@ -92,6 +92,7 @@
   "uni-karlsruhe.de",
   "uni-kiel.de",
   "uni.kn",
+  "th-koeln.de",
   "uni-koeln.de",
   "uni-konstanz.de",
   "htwk-leipzig.de",