diff --git a/.travis.yml b/.travis.yml
index 54b07b8..74752d9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,7 @@
 language: php
 
 php:
+  - 5.3
   - 5.4
 
 before_script:
diff --git a/README.md b/README.md
index 71091de..c0c27d7 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Redis PHP Mock [![Build Status](https://secure.travis-ci.org/M6Web/RedisMock.png)](http://travis-ci.org/M6Web/RedisMock)
 
-PHP 5.4+ library providing a Redis PHP mock for your tests.  
+PHP 5.3 library providing a Redis PHP mock for your tests.  
 
 ## Installation
 
@@ -9,7 +9,7 @@ Add this line in your `composer.json` :
 ```json
 {
     "require": {
-        "m6web/redis-mock": "dev-master"
+        "m6web/redis-mock": "~1.2"
     }
 }
 ```
diff --git a/composer.json b/composer.json
index 7780ad8..39e1e00 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         "psr-0": {"M6Web\\Component\\RedisMock": "src/"}
     },
     "require": {
-        "php": ">=5.4.0"
+        "php": ">=5.3.0"
     },
     "require-dev": {
         "atoum/atoum": "master-dev"
diff --git a/src/M6Web/Component/RedisMock/RedisMock.php b/src/M6Web/Component/RedisMock/RedisMock.php
index a804e31..bc1aeb8 100644
--- a/src/M6Web/Component/RedisMock/RedisMock.php
+++ b/src/M6Web/Component/RedisMock/RedisMock.php
@@ -248,7 +248,7 @@ public function zrevrange($key, $start, $stop, $withscores = false)
         return self::$pipeline ? $this : array_slice($set, $start, $length);
     }
 
-    public function zrangebyscore($key, $min, $max, array $options = [])
+    public function zrangebyscore($key, $min, $max, array $options = array())
     {
         if (!empty($options['withscores'])) {
             throw new UnsupportedException('Parameter `withscores` is not supported by RedisMock for `zrangebyscore` command.');
@@ -309,7 +309,7 @@ public function zrangebyscore($key, $min, $max, array $options = [])
         return self::$pipeline ? $this : array_values(array_slice($results, $options['limit'][0], $options['limit'][1], true));
     }
 
-    public function zrevrangebyscore($key, $max, $min, array $options = [])
+    public function zrevrangebyscore($key, $max, $min, array $options = array())
     {
         if (!empty($options['withscores'])) {
             throw new UnsupportedException('Parameter `withscores` is not supported by RedisMock for `zrevrangebyscore` command.');
@@ -354,7 +354,7 @@ public function zrevrangebyscore($key, $max, $min, array $options = [])
             }
         };
 
-        $results = [];
+        $results = array();
         foreach (self::$data[$key] as $k => $v) {
             if ($min == '-inf' && $isInfMax($v)) {
                 $results[] = $k;
diff --git a/tests/units/RedisMock.php b/tests/units/RedisMock.php
index e31feae..f909e85 100644
--- a/tests/units/RedisMock.php
+++ b/tests/units/RedisMock.php
@@ -82,22 +82,22 @@ public function testKeys() {
                 ->isEmpty()
             ->array($redisMock->keys('some*'))
                 ->hasSize(2)
-                ->containsValues(['something', 'someting_else'])
+                ->containsValues(array('something', 'someting_else'))
             ->array($redisMock->keys('*o*'))
                 ->hasSize(3)
-                ->containsValues(['something', 'someting_else', 'others'])
+                ->containsValues(array('something', 'someting_else', 'others'))
             ->array($redisMock->keys('*[ra]s*'))
                 ->hasSize(1)
-                ->containsValues(['others'])
+                ->containsValues(array('others'))
             ->array($redisMock->keys('*[rl]s*'))
                 ->hasSize(2)
-                ->containsValues(['someting_else', 'others'])
+                ->containsValues(array('someting_else', 'others'))
             ->array($redisMock->keys('somet?ing*'))
                 ->hasSize(1)
-                ->containsValues(['something'])
+                ->containsValues(array('something'))
             ->array($redisMock->keys('somet*ing*'))
                 ->hasSize(2)
-                ->containsValues(['something', 'someting_else']);
+                ->containsValues(array('something', 'someting_else'));
     }
 
     public function testSAddSMembersSIsMemberSRem()
@@ -129,7 +129,7 @@ public function testSAddSMembersSIsMemberSRem()
                 ->isEqualTo(0)
             ->array($redisMock->smembers('test'))
                 ->hasSize(1)
-                ->containsValues(['test1'])
+                ->containsValues(array('test1'))
             ->integer($redisMock->srem('test', 'test1'))
                 ->isEqualTo(1)
             ->integer($redisMock->sismember('test', 'test1'))
@@ -140,7 +140,7 @@ public function testSAddSMembersSIsMemberSRem()
                 ->isEqualTo(1)
             ->array($redisMock->smembers('test'))
                 ->hasSize(2)
-                ->containsValues(['test1', 'test2'])
+                ->containsValues(array('test1', 'test2'))
             ->exception(function() use ($redisMock) {
                 $redisMock->srem('test', 'test1', 'test2');
             })
@@ -387,24 +387,24 @@ public function testZRangeByScore()
                     'test3',
                     'test2',
                 ))
-            ->array($redisMock->zrangebyscore('test', '-inf', '15', ['limit' => [0, 2]]))
+            ->array($redisMock->zrangebyscore('test', '-inf', '15', array('limit' => array(0, 2))))
                 ->isEqualTo(array(
                     'test6',
                     'test1',
                 ))
-            ->array($redisMock->zrangebyscore('test', '-inf', '15', ['limit' => [1, 2]]))
+            ->array($redisMock->zrangebyscore('test', '-inf', '15', array('limit' => array(1, 2))))
                 ->isEqualTo(array(
                     'test1',
                     'test4',
                 ))
-            ->array($redisMock->zrangebyscore('test', '-inf', '15', ['limit' => [1, 3]]))
+            ->array($redisMock->zrangebyscore('test', '-inf', '15', array('limit' => array(1, 3))))
                 ->isEqualTo(array(
                     'test1',
                     'test4',
                     'test3',
                 ))
             ->exception(function() use ($redisMock) {
-                $redisMock->zrangebyscore('test', '-inf', '15', ['limit' => [1, 3], 'withscores' => true]);
+                $redisMock->zrangebyscore('test', '-inf', '15', array('limit' => array(1, 3), 'withscores' => true));
             })
                 ->isInstanceOf('\M6Web\Component\RedisMock\UnsupportedException')
             ->integer($redisMock->del('test'))
@@ -468,24 +468,24 @@ public function testZRevRangeByScore()
                     'test2',
                     'test3',
                 ))
-            ->array($redisMock->zrevrangebyscore('test', '15', '-inf', ['limit' => [0, 2]]))
+            ->array($redisMock->zrevrangebyscore('test', '15', '-inf', array('limit' => array(0, 2))))
                 ->isEqualTo(array(
                     'test2',
                     'test3',
                 ))
-            ->array($redisMock->zrevrangebyscore('test', '15', '-inf', ['limit' => [1, 2]]))
+            ->array($redisMock->zrevrangebyscore('test', '15', '-inf', array('limit' => array(1, 2))))
                 ->isEqualTo(array(
                     'test3',
                     'test4',
                 ))
-            ->array($redisMock->zrevrangebyscore('test', '15', '-inf', ['limit' => [1, 3]]))
+            ->array($redisMock->zrevrangebyscore('test', '15', '-inf', array('limit' => array(1, 3))))
                 ->isEqualTo(array(
                     'test3',
                     'test4',
                     'test1',
                 ))
             ->exception(function() use ($redisMock) {
-                $redisMock->zrevrangebyscore('test', '15', '-inf', ['limit' => [1, 3], 'withscores' => true]);
+                $redisMock->zrevrangebyscore('test', '15', '-inf', array('limit' => array(1, 3), 'withscores' => true));
             })
                 ->isInstanceOf('\M6Web\Component\RedisMock\UnsupportedException')
             ->integer($redisMock->del('test'))
@@ -519,12 +519,12 @@ public function testHSetHGetHexistsHGetAll()
                 ->isEqualTo('something else')
             ->array($redisMock->hgetall('test'))
                 ->hasSize(1)
-                ->containsValues(['something else'])
+                ->containsValues(array('something else'))
             ->integer($redisMock->hset('test', 'test2', 'something'))
                 ->isEqualTo(1)
             ->array($redisMock->hgetall('test'))
                 ->hasSize(2)
-                ->containsValues(['something', 'something else'])
+                ->containsValues(array('something', 'something else'))
             ->integer($redisMock->hexists('test', 'test1'))
                 ->isEqualTo(1)
             ->integer($redisMock->hexists('test', 'test3'))
diff --git a/tests/units/RedisMockFactory.php b/tests/units/RedisMockFactory.php
index dc4927d..7634039 100644
--- a/tests/units/RedisMockFactory.php
+++ b/tests/units/RedisMockFactory.php
@@ -37,7 +37,7 @@ public function testMock()
             ->integer($mock->sAdd('test', 'test2'))
                 ->isEqualTo(1)
             ->array($mock->sMembers('test'))
-                ->isEqualTo(['test1', 'test2'])
+                ->isEqualTo(array('test1', 'test2'))
             ->integer($mock->sRem('test', 'test1'))
                 ->isEqualTo(1)
             ->integer($mock->sRem('test', 'test2'))
@@ -91,12 +91,12 @@ public function testMockComplex()
                     'test3',
                     'test2'
                 ))
-            ->array($mock->zRangeByScore('test', '-inf', '+inf', ['limit' => [1, 2]]))
+            ->array($mock->zRangeByScore('test', '-inf', '+inf', array('limit' => array(1, 2))))
                 ->isEqualTo(array(
                     'test3',
                     'test2'
                 ))
-            ->array($mock->zrevrangebyscore('test', '+inf', '-inf', ['limit' => [1, 2]]))
+            ->array($mock->zrevrangebyscore('test', '+inf', '-inf', array('limit' => array(1, 2))))
                 ->isEqualTo(array(
                     'test3',
                     'test1'