diff --git a/includes/class-ssp-stats.php b/includes/class-ssp-stats.php
index 59d8926..12ee445 100755
--- a/includes/class-ssp-stats.php
+++ b/includes/class-ssp-stats.php
@@ -209,6 +209,12 @@ public function __construct ( $file = '', $version = '1.0.0', $db_version = '1.0
 		// Get required episode IDs for stats
 		add_action( 'init', array( $this, 'load_episode_ids' ), 10 );
 
+		// Add admin notice to upgrade stats table
+		add_action( 'admin_notices', array( $this, 'maybe_notify_stats_update' ) );
+
+		// Anonymise the IP address details stored in the database
+		add_action( 'admin_init', array( $this, 'maybe_update_stats_data' ), 11 );
+
 		// Track episode download
 		add_action( 'ssp_file_download', array( $this, 'track_download' ), 10, 3 );
 
@@ -338,6 +344,9 @@ public function track_download ( $file = '', $episode = 0, $referrer = '' ) {
 			return;
 		}
 
+		// Anonymise the ip address
+		$ip_address = ss_stats_anonymise_ip($ip_address);
+
 		// Create transient name from episode ID, IP address and referrer
 		$transient = 'sspdl_' . $episode_id . '_' . str_replace( '.', '', $ip_address ) . '_' . $referrer;
 
@@ -753,6 +762,10 @@ public function stats_page () {
 
 									$post = get_post( intval( $result->post_id ) );
 
+									if ( ! $post ) {
+										continue;
+									}
+
 									$sql = "SELECT `date` FROM $this->_table WHERE `post_id` = '".$result->post_id."'";
 
 									$episode_results = $wpdb->get_results( $sql );
@@ -1448,4 +1461,65 @@ public function dashboard_widget_callback(){
 		echo $html;
 
 	}
+
+	/**
+	 * Checks if the ssp_stats_ips_updated option is set, if not shows a message to the user.
+	 */
+	public function maybe_notify_stats_update(){
+		$ssp_stats_ips_updated = get_option( 'ssp_stats_ips_updated', 'no' );
+		if ( 'yes' === $ssp_stats_ips_updated ) {
+			return;
+		}
+		$data_upgrade_url = add_query_arg( array( 'upgrade_stats_table' => 'anonymise_ip' ) );
+		?>
+		<div class="notice notice-warning">
+			<p><?php _e( 'Seriously Simple Stats needs to perform an update to the stats database table. Click below to perform this one-time update.', 'seriously-simple-stats' ); ?></p>
+			<p><a href="<?php echo $data_upgrade_url ?>"><?php _e( 'Upgrade stats table.', 'seriously-simple-stats' ); ?></a></p>
+		</div>
+		<?php
+	}
+
+	/**
+	 * Attempt to update the stats table
+	 */
+	public function maybe_update_stats_data(){
+
+		if ( ! isset( $_GET['upgrade_stats_table'] ) ) {
+			return;
+		}
+
+		$upgrade_stats_table = filter_var( $_GET['upgrade_stats_table'], FILTER_SANITIZE_STRING );
+		if ( ! 'anonymise_ip' === $upgrade_stats_table ) {
+			return;
+		}
+
+		global $wpdb;
+		$query = "UPDATE {$wpdb->prefix}ssp_stats SET ip_address = CONCAT( SUBSTRING_INDEX( ip_address, '.', 3 ) , '.0' )";
+		$affected_rows = $wpdb->query($query);
+
+		if (false === $affected_rows){
+			add_action( 'admin_notices', array( $this, 'update_stats_data_failed' ) );
+		}else {
+			update_option( 'ssp_stats_ips_updated', 'yes' );
+			add_action( 'admin_notices', array( $this, 'update_stats_data_succeeded' ) );
+		}
+
+	}
+
+	public function update_stats_data_failed(){
+		?>
+		<div class="notice notice-warning is-dismissible">
+			<p><?php _e( 'An error occurred updating the stats database table, please try again or contact support.', 'seriously-simple-stats' ); ?></p>
+		</div>
+		<?php
+	}
+
+	public function update_stats_data_succeeded(){
+		?>
+		<div class="notice notice-success is-dismissible">
+			<p><?php _e( 'Updating the stats database table completed successfully.', 'seriously-simple-stats' ); ?></p>
+		</div>
+		<?php
+	}
+
 }
diff --git a/readme.txt b/readme.txt
index 239a040..54f65ea 100644
--- a/readme.txt
+++ b/readme.txt
@@ -3,7 +3,7 @@ Contributors: PodcastMotor, psykro, simondowdles, hlashbrooke, seriouspodcaster
 Tags: seriously simple podcasting, stats, statistics, listeners, analytics, podcast, podcasting, ssp, free, add-ons, extensions, addons
 Requires at least: 4.4
 Tested up to: 4.8.2
-Stable tag: 1.2.0
+Stable tag: 1.2.1
 License: GPLv2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -78,6 +78,10 @@ Yes. This plugin uses the [Crawler Detect](https://github.com/JayBizzle/Crawler-
 
 == Changelog ==
 
+= 1.2.1 =
+* 2018-05-25
+* [NEW] Included a stats table upgrade to anonymise IP addresses stored
+
 = 1.2.0 =
 * 2017-10-11
 * [NEW] Added stats widget to WordPress dashboard
diff --git a/seriously-simple-stats.php b/seriously-simple-stats.php
index b74549b..79c4c3a 100644
--- a/seriously-simple-stats.php
+++ b/seriously-simple-stats.php
@@ -1,11 +1,11 @@
 <?php
 /*
  * Plugin Name: Seriously Simple Stats
- * Version: 1.2.0
+ * Version: 1.2.1
  * Plugin URI: https://wordpress.org/plugins/seriously-simple-stats
  * Description: Integrated analytics and stats tracking for Seriously Simple Podcasting.
- * Author: PodcastMotor
- * Author URI: https://www.podcastmotor.com/
+ * Author: Castos
+ * Author URI: https://www.castos.com/
  * Requires at least: 4.4
  * Tested up to: 4.8.2
  *
@@ -16,7 +16,7 @@
  * @author Hugh Lashbrooke
  * @since 1.0.0
  *
- * @author PodcastMotor
+ * @author Castos
  * @since 1.2.0
  *
  */
@@ -25,7 +25,7 @@
 	exit;
 }
 
-define( 'SSP_STATS_VERSION', '1.2.0' );
+define( 'SSP_STATS_VERSION', '1.2.1' );
 
 if ( ! function_exists( 'is_ssp_active' ) ) {
 	require_once( 'ssp-includes/ssp-functions.php' );
diff --git a/ssp-includes/ssp-functions.php b/ssp-includes/ssp-functions.php
index a60dff3..7048ea9 100644
--- a/ssp-includes/ssp-functions.php
+++ b/ssp-includes/ssp-functions.php
@@ -14,4 +14,19 @@
 	function is_ssp_active( $minimum_version = '' ) {
 		return SSP_Dependencies::ssp_active_check( $minimum_version );
 	}
-}
\ No newline at end of file
+}
+
+/**
+ * Anonymises IP address data by replacing the last octet with 0 (zero)
+ */
+if ( ! function_exists( 'ss_stats_anonymise_ip' ) ) {
+	function ss_stats_anonymise_ip( $ip = '' ) {
+		if ( empty( $ip ) ) {
+			return $ip;
+		}
+		$ip_octets    = explode( '.', $ip );
+		$ip_octets[3] = '0';
+		$ip           = implode( '.', $ip_octets );
+		return $ip;
+	}
+}