diff --git a/.travis.yml b/.travis.yml
index 6fc7c89..f13c2b9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,8 +11,5 @@ env:
    - HHVM_VERSION=latest
 install:
  - docker pull hhvm/hhvm:$HHVM_VERSION
- - docker pull redis:5.0-alpine
 script:
- - docker network create testing-network
- - docker run --name redis --network testing-network
- - docker run --name hhvm --rm -w /var/source -v $(pwd):/var/source hhvm/hhvm:$HHVM_VERSION ./.travis.sh
+ - docker run --rm -w /var/source -v $(pwd):/var/source hhvm/hhvm:$HHVM_VERSION ./.travis.sh
diff --git a/README.md b/README.md
index 1ef4cea..4c9a0c4 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ $ hhvm -d xdebug.enable=0 -d hhvm.jit=0 -d hhvm.php7.all=1\
 
 ## Usage
 
-*supported apc, memcached, redis, map, void, filesystem*
+*supported apc, memcached, map, void, filesystem*
 
 ### Using the CacheManager
 
@@ -183,17 +183,3 @@ $mc->addServers([['127.0.0.1', 11211]]);
 $cache->setMemcached($mc);
 $cache->save("qwerty", new Element('testing:cache', 0));
 ```
-
-#### RedisCache
-
-```hack
-<?hh
-use Nazg\HCache\Element;
-use Nazg\HCache\Driver\RedisCache;
-
-$cache = new RedisCache();
-$redis = new Redis();
-$redis->connect('127.0.0.1', 6379);
-$cache->setRedis($redis);
-$cache->save("qwerty", new Element('testing:cache', 0));
-```
diff --git a/src/CacheManager.hack b/src/CacheManager.hack
index 3055435..61c7185 100644
--- a/src/CacheManager.hack
+++ b/src/CacheManager.hack
@@ -25,7 +25,6 @@ class CacheManager {
     'map' => \Nazg\HCache\Driver\MapCache::class,
     'file' => \Nazg\HCache\Driver\FileSystemCache::class,
     'memcached' => \Nazg\HCache\Driver\MemcachedCache::class,
-    'redis' => \Nazg\HCache\Driver\RedisCache::class,
   };
 
   protected Map<string, (function():CacheProvider)> $userCache = Map{};
diff --git a/src/Driver/RedisCache.hack b/src/Driver/RedisCache.hack
deleted file mode 100644
index b55aea8..0000000
--- a/src/Driver/RedisCache.hack
+++ /dev/null
@@ -1,71 +0,0 @@
-/**
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * This software consists of voluntary contributions made by many individuals
- * and is licensed under the MIT license.
- *
- * Copyright (c) 2017-2019 Yuuki Takezawa
- *
- */
-namespace Nazg\HCache\Driver;
-
-use type Redis;
-use type Nazg\HCache\Element;
-use type Nazg\HCache\CacheProvider;
-
-class RedisCache extends CacheProvider {
-
-  protected ?Redis $redis;
-
-  public function setRedis(Redis $redis): void {
-    $redis->setOption(Redis::OPT_SERIALIZER, Redis::SERIALIZER_PHP);
-    $this->redis = $redis;
-  }
-
-  public function getRedis(): Redis {
-    invariant(
-      $this->redis instanceof Redis,
-      "Type mismatch"
-    );
-    return $this->redis;
-  }
-
-  <<__Override>>
-  public function fetch(string $id): mixed {
-    $element = $this->getRedis()->get($id);
-    if($element instanceof Element) {
-      return $element->getData();
-    }
-    return;
-  }
-
-  <<__Override>>
-  public function contains(string $id): bool {
-    return $this->getRedis()->exists($id);
-  }
-
-  <<__Override>>
-  public function save(string $id, Element $element): bool {
-    $lifeTime = $element->getLifetime();
-    if ($lifeTime > 0) {
-      return $this->getRedis()->setex($id, $lifeTime, $element);
-    }
-    return $this->getRedis()->set($id, $element);
-  }
-
-  <<__Override>>
-  public function delete(string $id): bool {
-    return $this->getRedis()->delete($id) >= 0;
-  }
-
-  <<__Override>>
-  public function flushAll(): bool {
-    return $this->getRedis()->flushDB();
-  }
-}
diff --git a/src/Element.hack b/src/Element.hack
index 33df35a..9c1b4b5 100644
--- a/src/Element.hack
+++ b/src/Element.hack
@@ -23,10 +23,12 @@ class Element {
     protected int $lifetime = 0
   ) { }
 
+  <<__Rx>>
   public function getData(): mixed {
     return $this->data;
   }
 
+  <<__Rx>>
   public function getLifetime(): int {
     return $this->lifetime;
   }
diff --git a/tests/CacheManagerTest.hack b/tests/CacheManagerTest.hack
index 6822513..ef74a7a 100644
--- a/tests/CacheManagerTest.hack
+++ b/tests/CacheManagerTest.hack
@@ -22,7 +22,6 @@ final class CacheManagerTest extends HackTest {
     expect($manager->createCache('file'))->toBeInstanceOf(FileSystemCache::class);
     expect($manager->createCache('apc'))->toBeInstanceOf(ApcCache::class);
     expect($manager->createCache('memcached'))->toBeInstanceOf(MemcachedCache::class);
-    expect($manager->createCache('redis'))->toBeInstanceOf(RedisCache::class);
     expect($manager->createCache('void'))->toBeInstanceOf(VoidCache::class);
   }
 
diff --git a/tests/Driver/RedisCacheTest.hack b/tests/Driver/RedisCacheTest.hack
deleted file mode 100644
index c16bd4a..0000000
--- a/tests/Driver/RedisCacheTest.hack
+++ /dev/null
@@ -1,35 +0,0 @@
-use type Redis;
-use function Facebook\FBExpect\expect;
-use type Facebook\HackTest\HackTest;
-use type Nazg\HCache\Element;
-use type Nazg\HCache\Driver\RedisCache;
-
-class RedisCacheTest extends HackTest {
-
-  public function testFetchShouldReturnNull(): void {
-    expect(() ==> {
-      $cache = new RedisCache();
-      expect($cache->fetch("qwerty"))->toBeNull();
-    })->toThrow(\HH\InvariantException::class);
-  }
-
-  public function testFetchShouldReturnNull2(): void {
-    $cache = new RedisCache();
-    $redis = new Redis();
-    $redis->connect('redis', 6379);
-    $cache->setRedis($redis);
-    $cache->save("qwerty", new Element('testing:cache', 0));
-    expect($cache->fetch("qwerty"))->toBeSame('testing:cache');
-    expect($cache->fetch("qwerty"))->toBeSame('testing:cache');
-    $cache->delete("qwerty");
-    expect($cache->fetch("qwerty"))->toBeNull();
-    $cache->save("qwerty", new Element('testing:cache', 5));
-    expect($cache->fetch("qwerty"))->toBeSame('testing:cache');
-    sleep(7);
-    expect($cache->fetch("qwerty"))->toBeNull();
-
-    $cache->save("qwerty", new Element('testing:cache', 0));
-    $cache->flushAll();
-    expect($cache->fetch("qwerty"))->toBeNull();
-  }
-}