diff --git a/registry.json b/registry.json
index fd25fa3a..81b9fc5b 100644
--- a/registry.json
+++ b/registry.json
@@ -1031,7 +1031,7 @@
   },
   "ObservableCollections": {
     "listed": true,
-    "version": "2.0.0"
+    "version": "1.0.0"
   },
   "ObservableCollections.R3": {
     "listed": true,