diff --git a/src/Prometheus/Storage/Redis.php b/src/Prometheus/Storage/Redis.php
index 04757b2..70b2cd2 100644
--- a/src/Prometheus/Storage/Redis.php
+++ b/src/Prometheus/Storage/Redis.php
@@ -11,10 +11,10 @@
 
 class Redis implements Adapter
 {
-    const PROMETHEUS_PREFIX = 'PROMETHEUS_';
     const PROMETHEUS_METRIC_KEYS_SUFFIX = '_METRIC_KEYS';
 
     private static $defaultOptions = array();
+    private static $prefix = 'PROMETHEUS_';
 
     private $options;
     private $redis;
@@ -51,6 +51,11 @@ public static function setDefaultOptions(array $options)
         self::$defaultOptions = array_merge(self::$defaultOptions, $options);
     }
 
+    public static function setPrefix($prefix)
+    {
+        self::$prefix = $prefix;
+    }
+
     public function flushRedis()
     {
         $this->openConnection();
@@ -118,7 +123,7 @@ public function updateHistogram(array $data)
                 $this->toMetricKey($data),
                 json_encode(array('b' => 'sum', 'labelValues' => $data['labelValues'])),
                 json_encode(array('b' => $bucketToIncrease, 'labelValues' => $data['labelValues'])),
-                self::PROMETHEUS_PREFIX . Histogram::TYPE . self::PROMETHEUS_METRIC_KEYS_SUFFIX,
+                self::$prefix . Histogram::TYPE . self::PROMETHEUS_METRIC_KEYS_SUFFIX,
                 $data['value'],
                 json_encode($metaData),
             ),
@@ -152,7 +157,7 @@ public function updateGauge(array $data)
             array(
                 $this->toMetricKey($data),
                 $this->getRedisCommand($data['command']),
-                self::PROMETHEUS_PREFIX . Gauge::TYPE . self::PROMETHEUS_METRIC_KEYS_SUFFIX,
+                self::$prefix . Gauge::TYPE . self::PROMETHEUS_METRIC_KEYS_SUFFIX,
                 json_encode($data['labelValues']),
                 $data['value'],
                 json_encode($metaData),
@@ -180,7 +185,7 @@ public function updateCounter(array $data)
             array(
                 $this->toMetricKey($data),
                 $this->getRedisCommand($data['command']),
-                self::PROMETHEUS_PREFIX . Counter::TYPE . self::PROMETHEUS_METRIC_KEYS_SUFFIX,
+                self::$prefix . Counter::TYPE . self::PROMETHEUS_METRIC_KEYS_SUFFIX,
                 json_encode($data['labelValues']),
                 $data['value'],
                 json_encode($metaData),
@@ -192,7 +197,7 @@ public function updateCounter(array $data)
 
     private function collectHistograms()
     {
-        $keys = $this->redis->sMembers(self::PROMETHEUS_PREFIX . Histogram::TYPE . self::PROMETHEUS_METRIC_KEYS_SUFFIX);
+        $keys = $this->redis->sMembers(self::$prefix . Histogram::TYPE . self::PROMETHEUS_METRIC_KEYS_SUFFIX);
         sort($keys);
         $histograms = array();
         foreach ($keys as $key) {
@@ -266,7 +271,7 @@ private function collectHistograms()
 
     private function collectGauges()
     {
-        $keys = $this->redis->sMembers(self::PROMETHEUS_PREFIX . Gauge::TYPE . self::PROMETHEUS_METRIC_KEYS_SUFFIX);
+        $keys = $this->redis->sMembers(self::$prefix . Gauge::TYPE . self::PROMETHEUS_METRIC_KEYS_SUFFIX);
         sort($keys);
         $gauges = array();
         foreach ($keys as $key) {
@@ -292,7 +297,7 @@ private function collectGauges()
 
     private function collectCounters()
     {
-        $keys = $this->redis->sMembers(self::PROMETHEUS_PREFIX . Counter::TYPE . self::PROMETHEUS_METRIC_KEYS_SUFFIX);
+        $keys = $this->redis->sMembers(self::$prefix . Counter::TYPE . self::PROMETHEUS_METRIC_KEYS_SUFFIX);
         sort($keys);
         $counters = array();
         foreach ($keys as $key) {
@@ -336,7 +341,7 @@ private function getRedisCommand($cmd)
      */
     private function toMetricKey(array $data)
     {
-        return implode(':', array(self::PROMETHEUS_PREFIX, $data['type'], $data['name']));
+        return implode(':', array(self::$prefix, $data['type'], $data['name']));
     }
 
 }