diff --git a/package.json b/package.json
index e5bc53d..d7487bf 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
   "dependencies": {
     "acorn": "^8.11.2",
     "acorn-jsx": "^5.3.2",
-    "agent-base": "^7.1.0",
+    "agent-base": "^9.0.0",
     "aggregate-error": "^5.0.0",
     "ajv": "^8.12.0",
     "ansi-escapes": "^7.0.0",