diff --git a/README.md b/README.md
index 0b07b03..f142dcb 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,11 @@ The ExpressionEngine Discussion Forum Module allows you to create and manage a f
 
 ## Changelog
 
+### 5.1.2
+
+- Fixed PHP deprecation issues.
+- Fixed a deprecated API call.
+
 ### 5.1.1
 
 - Fixed template links in the control panel.
diff --git a/system/user/addons/forum/addon.setup.php b/system/user/addons/forum/addon.setup.php
index fda5115..c0f69c5 100644
--- a/system/user/addons/forum/addon.setup.php
+++ b/system/user/addons/forum/addon.setup.php
@@ -5,7 +5,7 @@
     'author_url' => 'https://expressionengine.com/',
     'name' => 'Forum',
     'description' => 'Add a full-featured forum to your site',
-    'version' => '5.1.1',
+    'version' => '5.1.2',
     'namespace' => 'ExpressionEngine\Addons\Forum',
     'settings_exist' => true,
 
diff --git a/system/user/addons/forum/mod.forum.php b/system/user/addons/forum/mod.forum.php
index e4593b5..80e1ca4 100644
--- a/system/user/addons/forum/mod.forum.php
+++ b/system/user/addons/forum/mod.forum.php
@@ -13,8 +13,8 @@
  */
 class Forum
 {
-    public $version = '5.1.1';
-    public $build = '20230522';
+    public $version = '5.1.2';
+    public $build = '20251113';
     public $use_site_profile = false;
     public $search_limit = 250; // Maximum number of search results (x2 since it can include this number of topics + this number of posts)
     public $return_data = '';
@@ -46,6 +46,8 @@ class Forum
     public $is_table_open = false;
     public $preview_override = false;
     public $mbr_class_loaded = false;
+    public $MBR = null;
+    public $parse_php = false;
     public $read_topics_exist = false;
     public $SPELL = false;
     public $spellcheck_enabled = false;
diff --git a/system/user/addons/forum/mod.forum_core.php b/system/user/addons/forum/mod.forum_core.php
index 3c20842..9a98f84 100644
--- a/system/user/addons/forum/mod.forum_core.php
+++ b/system/user/addons/forum/mod.forum_core.php
@@ -1139,7 +1139,8 @@ public function _feed_builder()
 
         // Set the output type
         ee()->output->out_type = 'feed';
-        ee()->config->core_ini['send_headers'] = 'y';
+        ee()->config->set_item('send_headers', 'y');
+
         ee()->TMPL->template_type = 'feed';
 
         // Load the requested theme file