diff --git a/app/src/utils.tsx b/app/src/utils.tsx
index 5af1c35..adce913 100644
--- a/app/src/utils.tsx
+++ b/app/src/utils.tsx
@@ -37,6 +37,11 @@ export function isDir(path: string): boolean {
     }
 }
 
+export async function mtime(path: string): Promise<Date> {
+    const { mtime } = await stat(path)
+    return mtime
+}
+
 // is the given file binary?
 export async function isBinaryFile(path: string): Promise<boolean> {
     // Create a stream to read just the beginning