diff --git a/assets/checksums.txt b/assets/checksums.txt
index 2a719734b..d818b35bf 100644
--- a/assets/checksums.txt
+++ b/assets/checksums.txt
@@ -1,7 +1,7 @@
 39c6f45e6a3d4ec664d24fa9cc5869dc assets/ublock/thirdparty-lists.txt
 543a11c66e8ebda22e9817552da9d3b8 assets/ublock/privacy.txt
 41c57534508cde61b7b5af1279d8b363 assets/ublock/filters.txt
-675136acb5027b434b2c2568575c2f26 assets/ublock/mirror-candidates.txt
+38be8560dcce3820843a2b9abbda8b3d assets/ublock/mirror-candidates.txt
 19e25ce60f7b9e470c110334506b5e15 assets/ublock/filter-lists.json
 132b3ecc9da8a68c3faf740c00af734b assets/thirdparties/adblock-plus-japanese-filter.googlecode.com/hg/abp_jp.txt
 94c0a3eab74c42783855f07b22a429cf assets/thirdparties/home.fredfiber.no/langsholt/adblock.txt
diff --git a/assets/ublock/mirror-candidates.txt b/assets/ublock/mirror-candidates.txt
index 098cdbaf8..5b913a6aa 100644
--- a/assets/ublock/mirror-candidates.txt
+++ b/assets/ublock/mirror-candidates.txt
@@ -1,25 +1,30 @@
 ajax.googleapis.com
-    ^ajax\.googleapis\.com/ajax/libs/
+    ^ajax\.googleapis\.com\/ajax\/libs\/
 fonts.googleapis.com
     ^fonts\.googleapis\.com
 fonts.gstatic.com
     ^fonts\.gstatic\.com
 cdnjs.cloudflare.com
-    ^cdnjs\.cloudflare\.com/ajax/libs/
+    ^cdnjs\.cloudflare\.com\/ajax\/libs\/
 code.jquery.com
     ^code\.jquery\.com
 s0.2mdn.net
-    [^\\]*2mdn\.net/instream/html5/ima3\.js
+    [^\\]*2mdn\.net\/instream\/html5\/ima3\.js
 www.googletagservices.com
-    www\.googletagservices\.com/tag/js/gpt\.js
+    www\.googletagservices\.com\/tag\/js\/gpt\.js
 maxcdn.bootstrapcdn.com
-    ^maxcdn\.bootstrapcdn\.com/font-awesome/
+    ^maxcdn\.bootstrapcdn\.com\/font-awesome\/
 netdna.bootstrapcdn.com
-    [^\\]+\.bootstrapcdn\.com/bootstrap/
-    [^\\]+\.bootstrapcdn\.com/font-awesome/
+    [^\\]+\.bootstrapcdn\.com\/bootstrap\/
+    [^\\]+\.bootstrapcdn\.com\/font-awesome\/
 b.scorecardresearch.com
-    ^b\.scorecardresearch\.com/beacon\.js
+    ^b\.scorecardresearch\.com\/beacon\.js
 platform.twitter.com
-    ^platform\.twitter\.com/widgets\.js
+    ^platform\.twitter\.com\/widgets\.js
 cdn.quilt.janrain.com
-    ^cdn\.quilt\.janrain\.com/
+    ^cdn\.quilt\.janrain\.com\/
+
+# https://github.com/gorhill/uBlock/issues/270#issuecomment-57913228
+# Ref: http://www.asp.net/ajax/cdn
+ajax.aspnetcdn.com
+    ^ajax\.aspnetcdn\.com\/ajax\/[^?]+