diff --git a/h5bp/web_performance/cache_expiration.conf b/h5bp/web_performance/cache_expiration.conf
index 1f2055e..f6f52bd 100644
--- a/h5bp/web_performance/cache_expiration.conf
+++ b/h5bp/web_performance/cache_expiration.conf
@@ -25,20 +25,20 @@ map $sent_http_content_type $expires {
   ~*application/rdf\+xml                  1h;
   ~*application/rss\+xml                  1h;
 
-  ~*application/json                      0;
-  ~*application/ld\+json                  0;
-  ~*application/schema\+json              0;
-  ~*application/geo\+json                 0;
-  ~*application/xml                       0;
-  ~*text/calendar                         0;
-  ~*text/xml                              0;
+  ~*application/json                      off;
+  ~*application/ld\+json                  off;
+  ~*application/schema\+json              off;
+  ~*application/geo\+json                 off;
+  ~*application/xml                       off;
+  ~*text/calendar                         off;
+  ~*text/xml                              off;
 
   # Favicon (cannot be renamed!) and cursor images
   ~*image/vnd.microsoft.icon              1w;
   ~*image/x-icon                          1w;
 
   # HTML
-  ~*text/html                             0;
+  ~*text/html                             off;
 
   # JavaScript
   ~*application/javascript                1y;
@@ -47,11 +47,11 @@ map $sent_http_content_type $expires {
 
   # Manifest files
   ~*application/manifest\+json            1w;
-  ~*application/x-web-app-manifest\+json  0;
-  ~*text/cache-manifest                   0;
+  ~*application/x-web-app-manifest\+json  off;
+  ~*text/cache-manifest                   off;
 
   # Markdown
-  ~*text/markdown                         0;
+  ~*text/markdown                         off;
 
   # Media files
   ~*audio/                                1y;