diff --git a/yarn-project/yarn-project-base/scripts/update_package_jsons.mjs b/yarn-project/yarn-project-base/scripts/update_package_jsons.mjs
index 7f59317c058a..bc5f20ddca7e 100644
--- a/yarn-project/yarn-project-base/scripts/update_package_jsons.mjs
+++ b/yarn-project/yarn-project-base/scripts/update_package_jsons.mjs
@@ -34,6 +34,9 @@ function getUpdatedValue(source, target, key) {
   } else if (key === 'files') {
     const res = [...target[key], ...value];
     return Array.from(new Set(res));
+  } else if (key === 'types') {
+    // there should be a "types" key in package.json, but allow packages to overwrite it
+    return target[key] ?? value;
   } else {
     return value;
   }