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>