diff --git a/_includes/nav.html b/_includes/nav.html
index b1341e9..1c340f4 100644
--- a/_includes/nav.html
+++ b/_includes/nav.html
@@ -64,9 +64,11 @@
               </a>
             </span>
             <span class="ml-3 rounded-md">
-              <button type="button" class="mr-auto ml-auto block lg:hidden px-4 py-2 border border-black text-lg lg:text-xs leading-5 font-semibold rounded-md text-white opacity-50 bg-black hover:opacity-100 focus:outline-none focus:shadow-outline-blue focus:border-blue-300 active:text-gray-800 active:bg-gray-50 active:text-gray-800 transition duration-150 ease-in-out">
-                Sign In
-              </button>
+              <a href="{{ site.account_server_url }}account/sign_in">
+                <button type="button" class="mr-auto ml-auto block lg:hidden px-4 py-2 border border-black text-lg lg:text-xs leading-5 font-semibold rounded-md text-white opacity-50 bg-black hover:opacity-100 focus:outline-none focus:shadow-outline-blue focus:border-blue-300 active:text-gray-800 active:bg-gray-50 active:text-gray-800 transition duration-150 ease-in-out">
+                  Sign In
+                </button>
+              </a>
             </span>
           </div>
         </li>