diff --git a/overwrites/w3c.json b/overwrites/w3c.json
index 44e4f95ca..63b17e688 100644
--- a/overwrites/w3c.json
+++ b/overwrites/w3c.json
@@ -15,5 +15,6 @@
   { "id": "PNG",               "action": "createAlias", "aliasOf": "png-3"},
   { "id": "media-source",      "action": "renameTo", "newId": "media-source-1" },
   { "id": "media-source-1",    "action": "replaceProp", "prop": "href", "value": "https://www.w3.org/TR/media-source-1/" },
-  { "id": "media-source",      "action": "createAlias", "aliasOf": "media-source-2" }
+  { "id": "media-source",      "action": "createAlias", "aliasOf": "media-source-2" },
+  { "id": "encrypted-media",   "action": "createAlias", "aliasOf": "encrypted-media-2" }
 ]
diff --git a/refs/w3c.json b/refs/w3c.json
index ddc7a72c5..93af1c8a5 100644
--- a/refs/w3c.json
+++ b/refs/w3c.json
@@ -55531,6 +55531,147 @@
         },
         "repository": "https://github.com/w3c/encrypted-media"
     },
+    "encrypted-media-20130510": {
+        "aliasOf": "encrypted-media-1-20130510"
+    },
+    "encrypted-media-20131022": {
+        "aliasOf": "encrypted-media-1-20131022"
+    },
+    "encrypted-media-20140218": {
+        "aliasOf": "encrypted-media-1-20140218"
+    },
+    "encrypted-media-20140828": {
+        "aliasOf": "encrypted-media-1-20140828"
+    },
+    "encrypted-media-20150331": {
+        "aliasOf": "encrypted-media-1-20150331"
+    },
+    "encrypted-media-20150928": {
+        "aliasOf": "encrypted-media-1-20150928"
+    },
+    "encrypted-media-20151010": {
+        "aliasOf": "encrypted-media-1-20151010"
+    },
+    "encrypted-media-20151019": {
+        "aliasOf": "encrypted-media-1-20151019"
+    },
+    "encrypted-media-20151027": {
+        "aliasOf": "encrypted-media-1-20151027"
+    },
+    "encrypted-media-20151116": {
+        "aliasOf": "encrypted-media-1-20151116"
+    },
+    "encrypted-media-20151120": {
+        "aliasOf": "encrypted-media-1-20151120"
+    },
+    "encrypted-media-20151130": {
+        "aliasOf": "encrypted-media-1-20151130"
+    },
+    "encrypted-media-20160122": {
+        "aliasOf": "encrypted-media-1-20160122"
+    },
+    "encrypted-media-20160202": {
+        "aliasOf": "encrypted-media-1-20160202"
+    },
+    "encrypted-media-20160204": {
+        "aliasOf": "encrypted-media-1-20160204"
+    },
+    "encrypted-media-20160208": {
+        "aliasOf": "encrypted-media-1-20160208"
+    },
+    "encrypted-media-20160209": {
+        "aliasOf": "encrypted-media-1-20160209"
+    },
+    "encrypted-media-20160216": {
+        "aliasOf": "encrypted-media-1-20160216"
+    },
+    "encrypted-media-20160218": {
+        "aliasOf": "encrypted-media-1-20160218"
+    },
+    "encrypted-media-20160225": {
+        "aliasOf": "encrypted-media-1-20160225"
+    },
+    "encrypted-media-20160227": {
+        "aliasOf": "encrypted-media-1-20160227"
+    },
+    "encrypted-media-20160325": {
+        "aliasOf": "encrypted-media-1-20160325"
+    },
+    "encrypted-media-20160328": {
+        "aliasOf": "encrypted-media-1-20160328"
+    },
+    "encrypted-media-20160329": {
+        "aliasOf": "encrypted-media-1-20160329"
+    },
+    "encrypted-media-20160330": {
+        "aliasOf": "encrypted-media-1-20160330"
+    },
+    "encrypted-media-20160404": {
+        "aliasOf": "encrypted-media-1-20160404"
+    },
+    "encrypted-media-20160412": {
+        "aliasOf": "encrypted-media-1-20160412"
+    },
+    "encrypted-media-20160414": {
+        "aliasOf": "encrypted-media-1-20160414"
+    },
+    "encrypted-media-20160416": {
+        "aliasOf": "encrypted-media-1-20160416"
+    },
+    "encrypted-media-20160421": {
+        "aliasOf": "encrypted-media-1-20160421"
+    },
+    "encrypted-media-20160426": {
+        "aliasOf": "encrypted-media-1-20160426"
+    },
+    "encrypted-media-20160428": {
+        "aliasOf": "encrypted-media-1-20160428"
+    },
+    "encrypted-media-20160429": {
+        "aliasOf": "encrypted-media-1-20160429"
+    },
+    "encrypted-media-20160514": {
+        "aliasOf": "encrypted-media-1-20160514"
+    },
+    "encrypted-media-20160517": {
+        "aliasOf": "encrypted-media-1-20160517"
+    },
+    "encrypted-media-20160518": {
+        "aliasOf": "encrypted-media-1-20160518"
+    },
+    "encrypted-media-20160520": {
+        "aliasOf": "encrypted-media-1-20160520"
+    },
+    "encrypted-media-20160527": {
+        "aliasOf": "encrypted-media-1-20160527"
+    },
+    "encrypted-media-20160531": {
+        "aliasOf": "encrypted-media-1-20160531"
+    },
+    "encrypted-media-20160601": {
+        "aliasOf": "encrypted-media-1-20160601"
+    },
+    "encrypted-media-20160602": {
+        "aliasOf": "encrypted-media-1-20160602"
+    },
+    "encrypted-media-20160603": {
+        "aliasOf": "encrypted-media-1-20160603"
+    },
+    "encrypted-media-20160609": {
+        "aliasOf": "encrypted-media-1-20160609"
+    },
+    "encrypted-media-20160610": {
+        "aliasOf": "encrypted-media-1-20160610"
+    },
+    "encrypted-media-20160705": {
+        "aliasOf": "encrypted-media-1-20160705"
+    },
+    "encrypted-media-20170316": {
+        "aliasOf": "encrypted-media-1-20170316"
+    },
+    "encrypted-media-20170918": {
+        "aliasOf": "encrypted-media-1-20170918"
+    },
     "eo-qb": {
         "authors": [
             "Dmitry Brizhinev",