diff --git a/composer.json b/composer.json
index 218a9c4..be639d8 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": ">=5.6",
+        "php": ">=7.1",
         "ext-curl": "*",
         "ext-json" : "*",
         "league/oauth2-client": "~2.3"
diff --git a/src/Cache/Cache.php b/src/Cache/Cache.php
index bffd777..f6d5477 100644
--- a/src/Cache/Cache.php
+++ b/src/Cache/Cache.php
@@ -33,6 +33,7 @@ public function get($key);
      *
      * @param string $key
      * @param $data
+     * @param int|null $ttl
      * @return bool if successful
      */
     public function save($key, $data, ?int $ttl = null);
diff --git a/src/Cache/HashTrait.php b/src/Cache/HashTrait.php
index 2ea7b6b..79a8d05 100644
--- a/src/Cache/HashTrait.php
+++ b/src/Cache/HashTrait.php
@@ -39,11 +39,7 @@ public function hash($url, $id, array $headers)
      */
     public function isCachable($url, $httpMethod)
     {
-        if ($httpMethod === Client::HTTP_GET && $this->isInitialized()) {
-            return true;
-        }
-
-        return false;
+        return $httpMethod === Client::HTTP_GET && $this->isInitialized();
     }
 
     /**
diff --git a/src/Cache/MemcachedCache.php b/src/Cache/MemcachedCache.php
index 622a1f3..5e2ceb3 100644
--- a/src/Cache/MemcachedCache.php
+++ b/src/Cache/MemcachedCache.php
@@ -59,12 +59,12 @@ public function get($key)
     }
 
     /**
-     * Save an object.
+     * Save in cache
      *
-     * @param $key
+     * @param string $key
      * @param $data
-     *
-     * @return bool
+     * @param int|null $ttl
+     * @return bool if successful
      */
     public function save($key, $data, ?int $ttl = null)
     {
@@ -90,6 +90,6 @@ public function delete($key)
      */
     public function isInitialized()
     {
-        return $this->cache == null;
+        return $this->cache !== null;
     }
 }
diff --git a/src/Cache/RedisCache.php b/src/Cache/RedisCache.php
index e73f617..cf2bb0d 100644
--- a/src/Cache/RedisCache.php
+++ b/src/Cache/RedisCache.php
@@ -43,11 +43,26 @@ public function __construct($server = 'localhost', $port = 6379, $ttl = 600, $ti
         }
     }
 
+    /**
+     * Get a cached object.
+     *
+     * @param $key
+     *
+     * @return mixed False is not found
+     */
     public function get($key)
     {
         return $this->redis !== null ? $this->redis->get($key) : false;
     }
 
+    /**
+     * Save in cache
+     *
+     * @param string $key
+     * @param $data
+     * @param int|null $ttl
+     * @return bool if successful
+     */
     public function save($key, $data, ?int $ttl = null)
     {
         $ttl = $ttl ?? $this->ttl;
@@ -55,11 +70,26 @@ public function save($key, $data, ?int $ttl = null)
         return $this->redis !== null ? $this->redis->setex($key, $ttl, $data) : false;
     }
 
+    /**
+     * Delete a cached object.
+     *
+     * @param $key
+     *
+     * @return bool if successful true
+     */
     public function delete($key)
     {
         return $this->redis->delete($key) === 1;
     }
 
+    /**
+     * @return bool
+     */
+    public function isInitialized()
+    {
+        return $this->redis !== null;
+    }
+
     protected function getSerializerValue()
     {
         if (defined('HHVM_VERSION')) {
@@ -67,12 +97,4 @@ protected function getSerializerValue()
         }
         return defined('Redis::SERIALIZER_IGBINARY') ? \Redis::SERIALIZER_IGBINARY : \Redis::SERIALIZER_PHP;
     }
-
-    /**
-     * @return bool
-     */
-    public function isInitialized()
-    {
-        return $this->redis != null;
-    }
-}
\ No newline at end of file
+}
diff --git a/src/Client/RequestTrait.php b/src/Client/RequestTrait.php
index 9c472a6..3f95713 100644
--- a/src/Client/RequestTrait.php
+++ b/src/Client/RequestTrait.php
@@ -68,8 +68,8 @@ public function makeRequest($relativeUrl, array $variables = array(), $httpMetho
             $postVariables = $variables;
         }
 
+        if ($this->getCache() !== null && $this->getCache()->isCachable($queryUrl, $httpMethod) && $shouldCache) {
 
-        if ($this->getCache() != null && $this->getCache()->isCachable($queryUrl, $httpMethod) && $shouldCache) {
             $result = $this->getFromCache($queryUrl);
 
             if ($result === false) {