diff --git a/includes/admin/core/class-admin-settings.php b/includes/admin/core/class-admin-settings.php
index 5568074e..8ffb9ea1 100644
--- a/includes/admin/core/class-admin-settings.php
+++ b/includes/admin/core/class-admin-settings.php
@@ -647,7 +647,13 @@ if ( ! class_exists( 'um\admin\core\Admin_Settings' ) ) {
 										'0' => __( 'No', 'ultimate-member' ),
 										'1' => __( 'Yes', 'ultimate-member' ),
 									]
-								)
+								),
+								array(
+									'id'        => 'activation_link_expiry_time',
+									'type'      => 'number',
+									'label'     => __( 'Activation link lifetime', 'ultimate-member' ),
+									'tooltip'   => __( 'How long does an activation link live? Leave empty for endless links.', 'ultimate-member' ),
+								),
 							)
 						),
 						'account'   => array(
diff --git a/includes/class-config.php b/includes/class-config.php
index 1f25edcc..c148fff1 100644
--- a/includes/class-config.php
+++ b/includes/class-config.php
@@ -577,6 +577,7 @@ if ( ! class_exists( 'um\Config' ) ) {
 				'member_directory_own_table'            => 0,
 				'profile_show_html_bio'                 => 0,
 				'profile_noindex'                       => 0,
+				'activation_link_expiry_time'           => '',
 			);
 
 			add_filter( 'um_get_tabs_from_config', '__return_true' );
diff --git a/includes/core/class-permalinks.php b/includes/core/class-permalinks.php
index 79f69fc9..b22185c5 100644
--- a/includes/core/class-permalinks.php
+++ b/includes/core/class-permalinks.php
@@ -187,6 +187,11 @@ if ( ! class_exists( 'um\core\Permalinks' ) ) {
 					wp_die( __( 'This activation link is expired or have already been used.', 'ultimate-member' ) );
 				}
 
+				$account_secret_hash_expiry = get_user_meta( $user_id, 'account_secret_hash_expiry', true );
+				if ( ! empty( $account_secret_hash_expiry ) && time() > $account_secret_hash_expiry ) {
+					wp_die( __( 'This activation link is expired.', 'ultimate-member' ) );
+				}
+
 				um_fetch_user( $user_id );
 				UM()->user()->approve();
 				um_reset_user();
diff --git a/includes/core/class-user.php b/includes/core/class-user.php
index bf29c86b..2272317a 100644
--- a/includes/core/class-user.php
+++ b/includes/core/class-user.php
@@ -1336,6 +1336,13 @@ if ( ! class_exists( 'um\core\User' ) ) {
 
 			$this->profile['account_secret_hash'] = UM()->validation()->generate();
 			$this->update_usermeta_info( 'account_secret_hash' );
+
+			$expiry_time = UM()->options()->get( 'activation_link_expiry_time' );
+			if ( ! empty( $expiry_time ) && is_numeric( $expiry_time ) ) {
+				$this->profile['account_secret_hash_expiry'] = time() + $expiry_time;
+				$this->update_usermeta_info( 'account_secret_hash_expiry' );
+			}
+
 			/**
 			 * UM hook
 			 *
@@ -1436,6 +1443,7 @@ if ( ! class_exists( 'um\core\User' ) ) {
 
 			$this->set_status( 'approved' );
 			$this->delete_meta( 'account_secret_hash' );
+			$this->delete_meta( 'account_secret_hash_expiry' );
 
 			/**
 			 * UM hook