diff --git a/composer.json b/composer.json
index 3d04969..e882858 100644
--- a/composer.json
+++ b/composer.json
@@ -27,5 +27,10 @@
         "zendframework/zend-i18n": "Required for rendering forms with ZendFramework2",
         "zendframework/zend-servicemanager": "Required for rendering forms with ZendFramework2",
         "zendframework/zend-view": "Required for rendering forms with ZendFramework2"
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "1.0.x-dev"
+        }
     }
 }
diff --git a/library/SSRS/Soap/NTLM.php b/library/SSRS/Soap/NTLM.php
index 17d1547..cd00970 100755
--- a/library/SSRS/Soap/NTLM.php
+++ b/library/SSRS/Soap/NTLM.php
@@ -165,10 +165,12 @@ public function callCurl($url, $data = null, $action = null) {
         }
 
         $httpCode = curl_getinfo($handle, CURLINFO_HTTP_CODE);
-        if ($httpCode >= 300 && $httpCode <= 600) {
-            throw ServerException::fromResponse($response);
-        } else if ($httpCode !== 200) {
-            throw new Exception('HTTP error: ' . $httpCode . ' ' . $response, $httpCode, $response);
+        if ($httpCode !== 200) {
+            if ($response !== '' && $httpCode >= 300 && $httpCode <= 600) {
+                throw ServerException::fromResponse($response);
+            } else {
+                throw new Exception('HTTP error: ' . $httpCode . ' ' . $response, $httpCode, $response);
+            }
         }
         curl_close($handle);