diff --git a/package.json b/package.json
index 0f54fb3..6cfb92c 100644
--- a/package.json
+++ b/package.json
@@ -152,7 +152,7 @@
     "repler": "github:johntalton/repler",
     "rxjs": "^7.5.6",
     "typescript": "^4.7.4",
-    "zen-observable": "^0.8.13"
+    "zen-observable": "^0.9.0"
   },
   "repository": {
     "type": "git",