diff --git a/package.json b/package.json
index 65c8153..c2558b8 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
         "preact": "^10.4.6",
         "promise-polyfill": "^8.1.3",
         "query-string": "^6.13.1",
-        "ts-toolbelt": "^6.9.9",
+        "ts-toolbelt": "^9.0.0",
         "unfetch": "^4.1.0"
     },
     "devDependencies": {