diff --git a/lib/domains/stoplist.txt b/lib/domains/stoplist.txt
index 2291e18764..77edea3afa 100644
--- a/lib/domains/stoplist.txt
+++ b/lib/domains/stoplist.txt
@@ -661,4 +661,5 @@ newcastle.ac.uk
 whitecaps.gc.edu
 mail.chzu.edu.cn
 sm.imamu.edu.sa
-ug.edu.ec
\ No newline at end of file
+ug.edu.ec
+sti.edu.ph
\ No newline at end of file