diff --git a/my/spoor/content/external.json b/my/spoor/content/external.json
index c6396ae..a3e0054 100644
--- a/my/spoor/content/external.json
+++ b/my/spoor/content/external.json
@@ -34,9 +34,17 @@
     },
     "tvdbv4": {
       "type": "object",
-      "required": [ "id" ],
+      "required": [ "id", "type" ],
       "properties": {
-        "id": { "type": "integer" }
+        "id": { "type": "integer" },
+        "type": {
+          "type": "string",
+          "knownValues": [
+            "series",
+            "season",
+            "movie"
+          ]
+        }
       }
     }
   }