diff --git a/README.md b/README.md
index 9ef623b..e3953e0 100644
--- a/README.md
+++ b/README.md
@@ -374,13 +374,11 @@ If you are serving your static files with whitenoise, by default your files comp
 ```python
 import re
 
-# Vite generates files with 8 hash digits
 # http://whitenoise.evans.io/en/stable/django.html#WHITENOISE_IMMUTABLE_FILE_TEST
 
 def immutable_file_test(path, url):
-    # Match filename with 12 hex digits before the extension
-    # e.g. app.db8f2edc0c8a.js
-    return re.match(r"^.+[\.\-][0-9a-f]{8,12}\..+$", url)
+    # Match vite (rollup)-generated hashes, à la, `some_file-CSliV9zW.js`
+    return re.match(r"^.+[.-][0-9a-zA-Z_-]{8,12}\..+$", url)
 
 
 WHITENOISE_IMMUTABLE_FILE_TEST = immutable_file_test