diff --git a/src/workforce.js b/src/workforce.js
index 1000010..64dda1f 100644
--- a/src/workforce.js
+++ b/src/workforce.js
@@ -62,7 +62,7 @@ async function wfFetchPaged(path) {
   let page = 1
   while (true) {
     const sep = path.includes('?') ? '&' : '?'
-    const data = await wfFetch(`${path}${sep}page=${page}&per_page=100`)
+    const data = await wfFetch(`${path}${sep}page=${page}&page_size=100`)
     const items = Array.isArray(data) ? data : (data.users ?? data.departments ?? [])
     results.push(...items)
     if (items.length < 100) break