diff --git a/packages/agent-runtime/package.json b/packages/agent-runtime/package.json
index a139d5e8e..7ae31204c 100644
--- a/packages/agent-runtime/package.json
+++ b/packages/agent-runtime/package.json
@@ -26,7 +26,7 @@
     "bun": "1.3.11"
   },
   "dependencies": {
-    "gpt-tokenizer": "^2.8.1",
+    "gpt-tokenizer": "^4.0.0",
     "zod-from-json-schema": "0.4.2",
     "lodash": "4.17.23",
     "typescript": "5.5.4"