diff --git a/src/Plugin/Block/DisqusBaseBlock.php b/src/Plugin/Block/DisqusBaseBlock.php
index bd6378f..6348f29 100644
--- a/src/Plugin/Block/DisqusBaseBlock.php
+++ b/src/Plugin/Block/DisqusBaseBlock.php
@@ -134,7 +134,7 @@ public function blockSubmit($form, FormStateInterface $form_state) {
   public function build() {
     $function = $this->functionId();
     $url = Url::fromUri(
-      "http://disqus.com/forums/{$this->disqusConfig->get('disqus_domain')}/$function.js",
+      "//disqus.com/forums/{$this->disqusConfig->get('disqus_domain')}/$function.js",
       [
         'external' => TRUE,
         'query' => $this->buildQuery(),