diff --git a/includes/class-redis.php b/includes/class-redis.php
index f024e33..23b2e1b 100644
--- a/includes/class-redis.php
+++ b/includes/class-redis.php
@@ -173,7 +173,7 @@ public static function add(
 	) {
 		return [
 			self::set( $key, $value, self::expiry_time() ),
-			self::set( $key . '-modified', time(), self::expiry_time() ),
+			self::set( "{$key}-modified", time(), self::expiry_time() ),
 		];
 	}
 
@@ -338,15 +338,18 @@ protected static function lua_flush_closure(
 	}
 
 	/**
-	 * Retrieved set WP Rocket expiry time
+	 * Retrieves set WP Rocket expiry time in hours
 	 *
 	 * @since 1.0.0
-	 * @return int
+	 * @return int Expiry in hours
 	 */
 	protected static function expiry_time() {
 		static $expiry;
 		if ( ! isset( $expiry ) ) {
-			$expiry = get_rocket_purge_cron_interval();
+			$hours = function_exists( 'get_rocket_option' )
+				? get_rocket_option( 'purge_cron_interval' )
+				: 10;
+			$expiry = $hours * HOUR_IN_SECONDS;
 		}
 		return $expiry;
 	}
diff --git a/overrides/wp-rocket/buffer/functions.php b/overrides/wp-rocket/buffer/functions.php
index 2a06301..5b31224 100644
--- a/overrides/wp-rocket/buffer/functions.php
+++ b/overrides/wp-rocket/buffer/functions.php
@@ -62,7 +62,9 @@ function filemtime( $filename ) {
  */
 function readfile( $filename, $use_include_path = false, $context = null ) {
 	if ( Redis::is_active() ) {
-		return Redis::get( $filename );
+		$content = Redis::get( $filename );
+		echo $content;
+		return strlen( $content ) ?: false;
 	}
 	return \readfile( $filename, $use_include_path, $context );
 }
@@ -77,7 +79,9 @@ function readfile( $filename, $use_include_path = false, $context = null ) {
  */
 function readgzfile( $filename, $use_include_path = 0 ) {
 	if ( Redis::is_active() ) {
-		return Redis::get( $filename );
+		$content = Redis::get( $filename );
+		echo gzdecode( $content );
+		return strlen( $content ) ?: false;
 	}
 	return \readgzfile( $filename, $use_include_path );
 }
diff --git a/readme.txt b/readme.txt
index f2a6337..e564700 100644
--- a/readme.txt
+++ b/readme.txt
@@ -3,7 +3,7 @@
 Tags: redis, cache, wp-rocket
 Tested up to: 5.2
 Requires PHP: 7.0
-Stable tag: 1.0.0
+Stable tag: 1.0.2
 License: GPLv3 or later
 License URI: http://www.gnu.org/licenses/gpl-3.0.html
 
@@ -22,6 +22,10 @@ It therefore requires a working Redis server.
 
 == Changelog ==
 
+= 1.0.2 =
+* Fixed the cache retrieval override functions
+* Fixed the expiry time method of the redis class as WP Rocket changed its API
+
 = 1.0.1 =
 * Allows for the translation of the plugin
 * Added German translations
diff --git a/wpr-redis.php b/wpr-redis.php
index 9d113ba..e20b56a 100644
--- a/wpr-redis.php
+++ b/wpr-redis.php
@@ -3,7 +3,7 @@
  * Plugin Name: WP Rocket Redis
  * Plugin URI: https://github.com/naxvog/wpr-redis/
  * Description: Addon to WP Rocket that allows storage of cache files in Redis.
- * Version: 1.0.1
+ * Version: 1.0.2
  * Author: naxvog <naxvog@users.noreply.github.com>
  * Author URI: https://github.com/naxvog/
  * Text Domain: wpr-redis
@@ -34,12 +34,20 @@
 $loader->add_namespace( 'WPR_Redis', WPR_REDIS_INCLUDE_PATH );
 $loader->add_namespace( 'WP_Rocket', WPR_REDIS_OVERRIDE_PATH . '/wp-rocket' );
 
-function wpr_redis() {
-	static $instance;
-	if ( ! isset( $instance ) ) {
-		$instance = new WPR_Redis\WPR_Redis();
+if ( ! function_exists( 'wpr_redis' ) ) :
+	/**
+	 * Instance function to initialize and/or retrieve the plugin instance.
+	 * 
+	 * @since 1.0.0
+	 * @return \WPR_Redis\WPR_Redis
+	 */
+	function wpr_redis() {
+		static $instance;
+		if ( ! isset( $instance ) ) {
+			$instance = new WPR_Redis\WPR_Redis();
+		}
+		return $instance;
 	}
-	return $instance;
-}
+endif;
 
 wpr_redis();