diff --git a/specs.json b/specs.json
index 726acdd1..a39e53ca 100644
--- a/specs.json
+++ b/specs.json
@@ -444,6 +444,7 @@
       "sourcePath": "actions/index.html"
     }
   },
+  "https://w3c.github.io/mediacapture-extensions/",
   "https://w3c.github.io/permissions-registry/",
   {
     "url": "https://w3c.github.io/PNG-spec/",