diff --git a/lib/domains/blacklist.txt b/lib/domains/blacklist.txt
index 488b6e07dc..a01e40841c 100644
--- a/lib/domains/blacklist.txt
+++ b/lib/domains/blacklist.txt
@@ -1,7 +1,6 @@
 si.edu
 america.edu
 californiacolleges.edu
-maricopa.edu
 cet.edu
 australia.edu
 alumni.nottingham.ac.uk