diff --git a/h5bp/web_performance/cache_expiration.conf b/h5bp/web_performance/cache_expiration.conf
index c023581..1f2055e 100644
--- a/h5bp/web_performance/cache_expiration.conf
+++ b/h5bp/web_performance/cache_expiration.conf
@@ -12,7 +12,7 @@
 # https://nginx.org/en/docs/http/ngx_http_headers_module.html#expires
 
 map $sent_http_content_type $expires {
-  default                                 1M;
+  default                                 1y;
 
   # No content
   ""                                      off;