diff --git a/h5bp/location/web_performance_filename-based_cache_busting.conf b/h5bp/location/web_performance_filename-based_cache_busting.conf
index c2c9435..ea9e1b9 100644
--- a/h5bp/location/web_performance_filename-based_cache_busting.conf
+++ b/h5bp/location/web_performance_filename-based_cache_busting.conf
@@ -9,6 +9,6 @@
 # using something like `*.css?v231`, please see:
 # https://www.stevesouders.com/blog/2008/08/23/revving-filenames-dont-use-querystring/
 
-location ~* (.+)\.(?:\d+)\.(bmp|css|cur|gif|ico|jpe?g|m?js|png|svgz?|webp|webmanifest)$ {
+location ~* (.+)\.(?:\w+)\.(bmp|css|cur|gif|ico|jpe?g|m?js|png|svgz?|webp|webmanifest)$ {
   try_files $uri $1.$2;
 }