diff --git a/frontend/scripts/verify-node-version.mjs b/frontend/scripts/verify-node-version.mjs
index 494a00ab..422e3742 100644
--- a/frontend/scripts/verify-node-version.mjs
+++ b/frontend/scripts/verify-node-version.mjs
@@ -40,12 +40,14 @@ if (!gettingStartedGuide.includes(expectedDocumentationVersion)) {
   throw new Error(`docs/getting-started.md must name ${expectedDocumentationVersion}`);
 }
 // Types from a newer Node major type-check APIs this runtime lacks.
-const nodeTypesMajor = frontendPackage.devDependencies?.["@types/node"]
-  ?.replace(/^[\^~]/, "")
-  .split(".")[0];
+// The lockfile's resolved version is the truth a range, alias, or dependencies entry resolves to.
+const nodeTypesMajor =
+  frontendLockfile.packages?.["node_modules/@types/node"]?.version?.split(".")[0];
 const runtimeMajor = canonicalNodeVersion.split(".")[0];
 if (nodeTypesMajor !== undefined && nodeTypesMajor !== runtimeMajor) {
-  throw new Error(`frontend/package.json @types/node must stay on the Node ${runtimeMajor} major`);
+  throw new Error(
+    `frontend @types/node resolves to major ${nodeTypesMajor}; it must stay on the Node ${runtimeMajor} major`,
+  );
 }
 
 console.log(`Node ${canonicalNodeVersion} projections are synchronized.`);