diff --git a/.htaccess b/.htaccess
index 9494b53..57732c4 100644
--- a/.htaccess
+++ b/.htaccess
@@ -129,9 +129,9 @@ DirectoryIndex index.php index.html index.htm
 
     <FilesMatch "(\.js\.gz|\.css\.gz)$">
       # Serve correct encoding type.
-      Header append Content-Encoding gzip
+      Header set Content-Encoding gzip
       # Force proxies to cache gzipped & non-gzipped css/js files separately.
-      Header append Vary Accept-Encoding
+      Header set Vary Accept-Encoding
     </FilesMatch>
   </IfModule>
 </IfModule>