diff --git a/module/VuFind/config/module.config.php b/module/VuFind/config/module.config.php
index 06cccce950752030e22f24bcd8de7a5c1b8cfaae..19b1c050b4d535315097cef3ef2068f1169d8788 100644
--- a/module/VuFind/config/module.config.php
+++ b/module/VuFind/config/module.config.php
@@ -559,17 +559,23 @@ $config = array(
                 'factories' => array(
                     '360link' => function ($sm) {
                         return new \VuFind\Resolver\Driver\Threesixtylink(
-                            \VuFind\Config\Reader::getConfig()->OpenURL->url
+                            \VuFind\Config\Reader::getConfig()->OpenURL->url,
+                            $sm->getServiceLocator()->get('VuFind\Http')
+                                ->createClient()
                         );
                     },
                     'ezb' => function ($sm) {
                         return new \VuFind\Resolver\Driver\Ezb(
-                            \VuFind\Config\Reader::getConfig()->OpenURL->url
+                            \VuFind\Config\Reader::getConfig()->OpenURL->url,
+                            $sm->getServiceLocator()->get('VuFind\Http')
+                                ->createClient()
                         );
                     },
                     'sfx' => function ($sm) {
                         return new \VuFind\Resolver\Driver\Sfx(
-                            \VuFind\Config\Reader::getConfig()->OpenURL->url
+                            \VuFind\Config\Reader::getConfig()->OpenURL->url,
+                            $sm->getServiceLocator()->get('VuFind\Http')
+                                ->createClient()
                         );
                     },
                 ),
diff --git a/module/VuFind/src/VuFind/Resolver/Driver/Ezb.php b/module/VuFind/src/VuFind/Resolver/Driver/Ezb.php
index 19e951bfbd3dc97349d6788b0605d39f5556dbc9..32ca36238c81fcf1ddb6899612aae3dab94302f9 100644
--- a/module/VuFind/src/VuFind/Resolver/Driver/Ezb.php
+++ b/module/VuFind/src/VuFind/Resolver/Driver/Ezb.php
@@ -51,14 +51,23 @@ class Ezb implements DriverInterface
      */
     protected $baseUrl;
 
+    /**
+     * HTTP client
+     *
+     * @var \Zend\Http\Client
+     */
+    protected $httpClient;
+
     /**
      * Constructor
      *
-     * @param string $baseUrl Base URL for link resolver
+     * @param string            $baseUrl Base URL for link resolver
+     * @param \Zend\Http\Client $client  HTTP client
      */
-    public function __construct($baseUrl)
+    public function __construct($baseUrl, \Zend\Http\Client $httpClient)
     {
         $this->baseUrl = $baseUrl;
+        $this->httpClient = $httpClient;
     }
 
     /**
@@ -98,7 +107,7 @@ class Ezb implements DriverInterface
         // Make the call to the EZB and load results
         $url = $this->baseUrl . '?' . $openURL;
 
-        $feed = file_get_contents($url);
+        $feed = $this->httpClient->setUri($url)->send()->getBody();
         return $feed;
     }
 
diff --git a/module/VuFind/src/VuFind/Resolver/Driver/Sfx.php b/module/VuFind/src/VuFind/Resolver/Driver/Sfx.php
index 586a4da6c4707000aba15d44572d3552fad5b107..19c049503a60d86b2b08f88ea2d5be5ffde50188 100644
--- a/module/VuFind/src/VuFind/Resolver/Driver/Sfx.php
+++ b/module/VuFind/src/VuFind/Resolver/Driver/Sfx.php
@@ -48,14 +48,23 @@ class Sfx implements DriverInterface
      */
     protected $baseUrl;
 
+    /**
+     * HTTP client
+     *
+     * @var \Zend\Http\Client
+     */
+    protected $httpClient;
+
     /**
      * Constructor
      *
-     * @param string $baseUrl Base URL for link resolver
+     * @param string            $baseUrl Base URL for link resolver
+     * @param \Zend\Http\Client $client  HTTP client
      */
-    public function __construct($baseUrl)
+    public function __construct($baseUrl, \Zend\Http\Client $httpClient)
     {
         $this->baseUrl = $baseUrl;
+        $this->httpClient = $httpClient;
     }
 
     /**
@@ -72,7 +81,7 @@ class Sfx implements DriverInterface
         // Make the call to SFX and load results
         $url = $this->baseUrl . 
             '?sfx.response_type=multi_obj_detailed_xml&svc.fulltext=yes&' . $openURL;
-        $feed = file_get_contents($url);
+        $feed = $this->httpClient->setUri($url)->send()->getBody();
         return $feed;
     }
 
diff --git a/module/VuFind/src/VuFind/Resolver/Driver/Threesixtylink.php b/module/VuFind/src/VuFind/Resolver/Driver/Threesixtylink.php
index a2688bd9d3b2ed6af5a79315503d1bac1e242d6e..84c05e44d334fbdb4980b028a866001fc8a8be06 100644
--- a/module/VuFind/src/VuFind/Resolver/Driver/Threesixtylink.php
+++ b/module/VuFind/src/VuFind/Resolver/Driver/Threesixtylink.php
@@ -48,14 +48,23 @@ class Threesixtylink implements DriverInterface
      */
     protected $baseUrl;
 
+    /**
+     * HTTP client
+     *
+     * @var \Zend\Http\Client
+     */
+    protected $httpClient;
+
     /**
      * Constructor
      *
-     * @param string $baseUrl Base URL for link resolver
+     * @param string            $baseUrl Base URL for link resolver
+     * @param \Zend\Http\Client $client  HTTP client
      */
-    public function __construct($baseUrl)
+    public function __construct($baseUrl, \Zend\Http\Client $httpClient)
     {
         $this->baseUrl = $baseUrl;
+        $this->httpClient = $httpClient;
     }
 
     /**
@@ -72,7 +81,7 @@ class Threesixtylink implements DriverInterface
         // Make the call to SerialsSolutions and load results
         $url = $this->baseUrl . (substr($this->baseUrl, -1) == '/' ? '' : '/') .
             'openurlxml?version=1.0&' . $openURL;
-        $feed = file_get_contents($url);
+        $feed = $this->httpClient->setUri($url)->send()->getBody();
         return $feed;
     }