Try use .htaccess
diff --git a/.htaccess b/.htaccess
new file mode 100644
index 0000000..cd6692a
--- /dev/null
+++ b/.htaccess
@@ -0,0 +1,25 @@
+<IfModule mod_expires.c>
+ ExpiresActive on
+
+ ExpiresByType image/jpg "access plus 60 days"
+ ExpiresByType image/png "access plus 60 days"
+ ExpiresByType image/gif "access plus 60 days"
+ ExpiresByType image/jpeg "access plus 60 days"
+
+ ExpiresByType text/css "access plus 1 days"
+
+ ExpiresByType image/x-icon "access plus 1 month"
+
+ ExpiresByType application/pdf "access plus 1 month"
+ ExpiresByType audio/x-wav "access plus 1 month"
+ ExpiresByType audio/mpeg "access plus 1 month"
+ ExpiresByType video/mpeg "access plus 1 month"
+ ExpiresByType video/mp4 "access plus 1 month"
+ ExpiresByType video/quicktime "access plus 1 month"
+ ExpiresByType video/x-ms-wmv "access plus 1 month"
+ ExpiresByType application/x-shockwave-flash "access 1 month"
+
+ ExpiresByType text/javascript "access plus 1 week"
+ ExpiresByType application/x-javascript "access plus 1 week"
+ ExpiresByType application/javascript "access plus 1 week"
+</IfModule>