diff --git a/29/apache/config/redis.config.php b/29/apache/config/redis.config.php
index a5b13da6..bed36145 100644
--- a/29/apache/config/redis.config.php
+++ b/29/apache/config/redis.config.php
@@ -14,4 +14,8 @@ if (getenv('REDIS_HOST')) {
   } elseif (getenv('REDIS_HOST')[0] != '/') {
     $CONFIG['redis']['port'] = 6379;
   }
+  if (getenv('REDIS_DBINDEX') !== false) {
+    $CONFIG['redis']['dbindex'] = (int) getenv('REDIS_DBINDEX');
+  }
+
 }
diff --git a/README.md b/README.md
index b9f7a66d..b732f9dc 100644
--- a/README.md
+++ b/README.md
@@ -160,6 +160,7 @@ If you want to use Redis you have to create a separate [Redis](https://hub.docke
 - `REDIS_HOST` (not set by default) Name of Redis container
 - `REDIS_HOST_PORT` (default: `6379`) Optional port for Redis, only use for external Redis servers that run on non-standard ports.
 - `REDIS_HOST_PASSWORD` (not set by default) Redis password
+- `REDIS_DBINDEX`(not set by default) Value for dbindex config value
 
 The use of Redis is recommended to prevent file locking problems. See the examples for further instructions.