diff --git a/package.json b/package.json
index 0b104a8..a94d8a2 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,7 @@
   "name": "@seamapi/python",
   "private": true,
   "type": "module",
+  "packageManager": "npm@11.19.0",
   "scripts": {
     "generate": "tsx codegen/smith.ts",
     "pregenerate": "node generate-readme-toc.js",