diff --git a/packages/lexicons/defs/sh/comet/v0/feed/play.json b/packages/lexicons/defs/sh/comet/v0/feed/play.json
index 49108f6..4187917 100644
--- a/packages/lexicons/defs/sh/comet/v0/feed/play.json
+++ b/packages/lexicons/defs/sh/comet/v0/feed/play.json
@@ -10,7 +10,7 @@
         "type": "object",
         "required": ["subject", "createdAt"],
         "properties": {
-          "subject": { "type": "ref", "ref": "com.atproto.repo.strongRef" },
+          "subject": { "type": "string", "format": "at-uri" },
           "createdAt": { "type": "string", "format": "datetime" }
         }
       }
diff --git a/packages/lexicons/defs/sh/comet/v0/feed/playlist.json b/packages/lexicons/defs/sh/comet/v0/feed/playlist.json
index f2b6653..c3dff9d 100644
--- a/packages/lexicons/defs/sh/comet/v0/feed/playlist.json
+++ b/packages/lexicons/defs/sh/comet/v0/feed/playlist.json
@@ -13,7 +13,7 @@
           "tracks": {
             "type": "array",
             "minLength": 1,
-            "items": { "type": "ref", "ref": "com.atproto.repo.strongRef" }
+            "items": { "type": "string", "format": "at-uri" }
           },
           "image": {
             "type": "blob",