diff --git a/src/chrome/content/rules/Mercatus-Center.xml b/src/chrome/content/rules/Mercatus-Center.xml
index e5af3ce2875e..85a92fbff5d8 100644
--- a/src/chrome/content/rules/Mercatus-Center.xml
+++ b/src/chrome/content/rules/Mercatus-Center.xml
@@ -1,17 +1,45 @@
 <!--
 	For other George Mason University coverage, see George-Mason-University.xml.
 
--->
-<ruleset name="Mercatus Center" default_off="expired, self-signed">
+	Non-functional hosts
+		Couldn't connect to server:
+			 - regdatabeta.mercatus.org
+
+		SSL peer certificate was not OK:
+			 - cowps.mercatus.org
+			 - cwps.mercatus.org
+			 - fantasysports.mercatus.org
+			 - gspoa.mercatus.org
+			 - mediametrics.mercatus.org
+			 - neighborhoodeffects.mercatus.org
+			 - newjersey.mercatus.org
+
+		Peer certificate cannot be authenticated with given CA certificates:
+			 - my.mercatus.org
 
+		4xx client error:
+			 - capitolhillcampus.mercatus.org
+			 - development.mercatus.org
+			 - donate.mercatus.org
+			 - economicrecoverydigest.mercatus.org
+			 - insidestateandlocalpolicy.mercatus.org
+			 - localknowledge.mercatus.org
+			 - pages.mercatus.org
+			 - pensions.mercatus.org
+			 - regbudget.mercatus.org
+			 - regdata.mercatus.org
+			 - staff.mercatus.org
+-->
+<ruleset name="Mercatus Center (partial)">
 	<target host="mercatus.org" />
 	<target host="www.mercatus.org" />
+	<target host="asp.mercatus.org" />
+	<target host="grad.mercatus.org" />
+	<target host="hayek.mercatus.org" />
+	<target host="ppe.mercatus.org" />
+	<target host="students.mercatus.org" />
 
+	<securecookie host="^(www\.)?mercatus\.org$" name=".+" />
 
-	<!--	- Cert only matches //mercatus.org
-		- At least some pages redirect to http
-					-->
-	<rule from="^http://(?:www\.)?mercatus\.org/sites/"
-		to="https://mercatus.org/sites/" />
-
+	<rule from="^http:" to="https:" />
 </ruleset>