diff --git a/Earthfile b/Earthfile
index 8bb12fe..d7e2ae6 100644
--- a/Earthfile
+++ b/Earthfile
@@ -26,7 +26,7 @@ testdata:
   ARG node_version=24.12.0
   FROM node:$node_version-alpine
   # renovate: datasource=npm packageName=npm
-  ARG npm_version=11.7.0
+  ARG npm_version=11.9.0
   RUN npm i -g npm@$npm_version
   WORKDIR /intl
   COPY testdata.js .