1 files changed, 2 insertions, 1 deletions
diff --git a/src/HttpClient.php b/src/HttpClient.php
index f262a9f1..bfc65dc8 100644
--- a/src/HttpClient.php
+++ b/src/HttpClient.php
@@ -41,7 +41,8 @@ class HttpClient
             return null;
         }
 
-        if (empty($ctx = json_decode($ctx, true))) {
+        $ctx = json_decode($ctx, true);
+        if (is_null($ctx)) {
             // invalid context
             return null;
         }