diff --git a/package.json b/package.json
index ee3c948..11ae446 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   "main": "src/index.js",
   "dependencies": {
     "@convertkit/slate-lists": "0.2.3",
-    "immutable": "4.0.0-rc.12",
+    "immutable": "4.3.8",
     "react": "16.8.6",
     "react-dom": "16.8.6",
     "react-scripts": "3.0.1",