diff --git a/lib/domains/blacklist.txt b/lib/domains/blacklist.txt
index 1d28b4a117..1b7bee55d9 100644
--- a/lib/domains/blacklist.txt
+++ b/lib/domains/blacklist.txt
@@ -111,4 +111,5 @@ student.napavalley.edu
 mycom.marin.edu 
 alu.comillas.edu
 zknu.edu.cn
-go.sfcollege.edu
\ No newline at end of file
+go.sfcollege.edu
+kst.edu.sg
\ No newline at end of file
diff --git a/lib/domains/tlds.txt b/lib/domains/tlds.txt
index e06eddcab7..14ac47fd52 100644
--- a/lib/domains/tlds.txt
+++ b/lib/domains/tlds.txt
@@ -112,7 +112,6 @@ edu.ru
 edu.sa
 edu.sc
 edu.sd
-edu.sg
 edu.sh
 edu.sl
 edu.sv