diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e8dddf..4775900 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,11 +1,11 @@
 # Change Log
 All notable changes to this project will be documented in this file.
 
-## [3.1.3] - 2024-06-28 (dev)
+## [3.1.5] - 2024-06-28
 ### Update
-- Fixed issue with DNS test exclamation triangles buttons not showing up.
 - Fixed some compatibility issues with PHP 5.6 and 7.0.
-- SPF, DMIK and DMARC are now detected properly.
+- DNS test exclamation triangles icons now showing up in older versions of Moodle LMS.
+- Improved SPF, DMIK and DMARC detection.
 
 ## [3.1.2] - 2024-04-28
 ### Updated
diff --git a/locallib.php b/locallib.php
index 9b5cb41..8f53f60 100644
--- a/locallib.php
+++ b/locallib.php
@@ -148,7 +148,7 @@ function local_mailtest_checkdns($domain) {
     $message = '';
     $success = true;
 
-    $xmark = '<i class="fa fa-circle-xmark text-danger" aria-hidden="true"></i> ';
+    $xmark = '<i class="fa fa-times-circle text-danger" aria-hidden="true"></i> ';
     $checkmark = '<i class="fa fa-check-circle text-success" aria-hidden="true"></i> ';
     $exclamation = '<i class="fa fa-exclamation-triangle text-warning" aria-hidden="true"></i> ';
 
@@ -415,7 +415,7 @@ function local_mailtest_checkdns($domain) {
         }
     }
 
-    $icon = $success ? 'fa-info-circle text-info' : 'fa-triangle-exclamation text-warning';
+    $icon = $success ? 'fa-info-circle text-info' : 'fa-exclamation-triangle text-warning';
     $title = get_string('iconlabel', 'local_mailtest', $domain);
     $popupicon = '<a class="btn btn-link p-0" role="button" data-container="body" data-toggle="popover"'
         . ' data-placement="right" data-content="<div class=&quot;no-overflow&quot;><p>{message}</p></div>"'
diff --git a/version.php b/version.php
index cd0b95b..3d85fce 100644
--- a/version.php
+++ b/version.php
@@ -26,8 +26,8 @@
 defined('MOODLE_INTERNAL') || die();
 
 $plugin->component = 'local_mailtest';  // To check on upgrade, that module sits in correct place.
-$plugin->version   = 2024061900;        // The current module version (Date: YYYYMMDDXX).
+$plugin->version   = 2024062801;        // The current module version (Date: YYYYMMDDXX).
 $plugin->requires  = 2013040500;        // Requires Moodle version 2.5.
-$plugin->release   = '3.1.3';
+$plugin->release   = '3.1.5';
 $plugin->maturity  = MATURITY_STABLE;
 $plugin->cron      = 0;