diff --git a/src/BCLib/PrimoServices/Availability/AlmaClient.php b/src/BCLib/PrimoServices/Availability/AlmaClient.php
index 40bc59d..e9bb19c 100644
--- a/src/BCLib/PrimoServices/Availability/AlmaClient.php
+++ b/src/BCLib/PrimoServices/Availability/AlmaClient.php
@@ -31,7 +31,12 @@ class AlmaClient implements AvailabilityClient
     public function __construct(Client $client, $alma_host, $library)
     {
         $this->client = $client;
-        $this->alma_host = $alma_host;
+
+        if (strpos($alma_host, 'http://') === 0 || strpos($alma_host, 'https://') === 0) {
+            $this->alma_host = $alma_host;
+        } else {
+            $this->alma_host = 'http://' . $alma_host;
+        }
         $this->library = $library;
 
         $this->ava_map = [
@@ -90,7 +95,7 @@ private function buildUrl($ids)
                 'library' => $this->library
             ]
         );
-        return "http://{$this->alma_host}/view/publish_avail?$query";
+        return "{$this->alma_host}/view/publish_avail?$query";
     }
 
     /**
@@ -155,4 +160,4 @@ private function fetchAvailability(array $components)
         $response = $this->client->get($url)->send();
         return simplexml_load_string($response->getBody(true));
     }
-}
\ No newline at end of file
+}
diff --git a/src/BCLib/PrimoServices/PrimoServices.php b/src/BCLib/PrimoServices/PrimoServices.php
index 7e74995..40a893d 100644
--- a/src/BCLib/PrimoServices/PrimoServices.php
+++ b/src/BCLib/PrimoServices/PrimoServices.php
@@ -38,7 +38,12 @@ public function __construct(
         $version = '4.9',
         array $ignore_errors = []
     ) {
-        $this->_host = $host;
+        if (strpos($host, 'http://') === 0 || strpos($host, 'https://') === 0) {
+            $this->_host = $host;
+        } else {
+            $this->_host = 'http://' . $host;
+        }
+
         $this->_institution = $institution;
         if (null === $cache) {
             $this->_cache = new NullCache();
@@ -198,7 +203,7 @@ public function createDeepLink()
      */
     public function url($action, $query_string)
     {
-        return "http://{$this->_host}/PrimoWebServices/xservice/search/$action?json=true&$query_string";
+        return "{$this->_host}/PrimoWebServices/xservice/search/$action?json=true&$query_string";
     }
 
     public function getHost() {