diff --git a/core/basepage.php b/core/basepage.php
index 5806e880..410ae35b 100644
--- a/core/basepage.php
+++ b/core/basepage.php
@@ -230,7 +230,7 @@ class BasePage
     public function send_headers(): void
     {
         if (!headers_sent()) {
-            header("HTTP/1.0 {$this->code} Shimmie");
+            header("HTTP/1.1 {$this->code} Shimmie");
             header("Content-type: " . $this->mime);
             header("X-Powered-By: Shimmie-" . VERSION);
 
diff --git a/ext/downtime/main.php b/ext/downtime/main.php
index b42b1b74..dec32985 100644
--- a/ext/downtime/main.php
+++ b/ext/downtime/main.php
@@ -30,7 +30,7 @@ class Downtime extends Extension
                 $msg = $config->get_string("downtime_message");
                 $this->theme->display_message($msg);
                 if (!defined("UNITTEST")) {  // hax D:
-                    header("HTTP/1.0 {$page->code} Downtime");
+                    header("HTTP/1.1 {$page->code} Downtime");
                     print($page->data);
                     exit;
                 }
diff --git a/ext/ipban/main.php b/ext/ipban/main.php
index 3113dd79..e8c6c33b 100644
--- a/ext/ipban/main.php
+++ b/ext/ipban/main.php
@@ -170,7 +170,7 @@ class IPBan extends Extension
                     $event->user->class = $_shm_user_classes["ghost"];
                 }
             } else {
-                header("HTTP/1.0 403 Forbidden");
+                header("HTTP/1.1 403 Forbidden");
                 print "$msg";
                 exit;
             }