diff --git a/changes/23021-abm-cert-pem b/changes/23021-abm-cert-pem
new file mode 100644
index 0000000000..c1890e07bb
--- /dev/null
+++ b/changes/23021-abm-cert-pem
@@ -0,0 +1 @@
+- Download ABM public key as PEM format instead of CRT
diff --git a/frontend/pages/admin/components/DownloadFileButtons/DownloadABMKey.tsx b/frontend/pages/admin/components/DownloadFileButtons/DownloadABMKey.tsx
index 891ea45a58..7cd342f2da 100644
--- a/frontend/pages/admin/components/DownloadFileButtons/DownloadABMKey.tsx
+++ b/frontend/pages/admin/components/DownloadFileButtons/DownloadABMKey.tsx
@@ -21,7 +21,7 @@ interface IDownloadABMKeyProps {
 }
 
 const downloadKeyFile = (data: { public_key: string }) => {
-  downloadBase64ToFile(data.public_key, "fleet-mdm-apple-bm-public-key.crt");
+  downloadBase64ToFile(data.public_key, "fleet-mdm-apple-bm-public-key.pem");
 };
 
 // TODO: why can't we use Content-Dispostion for these? We're only getting one file back now.