diff --git a/h5bp/web_performance/cache_expiration.conf b/h5bp/web_performance/cache_expiration.conf
index 7923d2e..85f191c 100644
--- a/h5bp/web_performance/cache_expiration.conf
+++ b/h5bp/web_performance/cache_expiration.conf
@@ -52,15 +52,15 @@ map $sent_http_content_type $expires {
   ~*text/markdown                         0;
 
   # Media files
-  ~*audio/.*                              1M;
-  ~*image/.*                              1M;
-  ~*video/.*                              1M;
+  ~*audio/                                1M;
+  ~*image/                                1M;
+  ~*video/                                1M;
 
   # WebAssembly
   ~*application/wasm                      1y;
 
   # Web fonts
-  ~*font/.*                               1M;
+  ~*font/                                 1M;
   ~*application/vnd.ms-fontobject         1M;
   ~*application/x-font-ttf                1M;
   ~*application/x-font-woff               1M;