diff --git a/packages/ax-signatures/package.json b/packages/ax-signatures/package.json
index e206893..dac8967 100644
--- a/packages/ax-signatures/package.json
+++ b/packages/ax-signatures/package.json
@@ -12,6 +12,6 @@
     "test": "bun test"
   },
   "dependencies": {
-    "@ax-llm/ax": "^16.0.10"
+    "@ax-llm/ax": "^18.0.7"
   }
 }