diff --git a/app/Lib/Tools/HttpSocketExtended.php b/app/Lib/Tools/HttpSocketExtended.php
index cfe097c2861..051c0ae60c4 100644
--- a/app/Lib/Tools/HttpSocketExtended.php
+++ b/app/Lib/Tools/HttpSocketExtended.php
@@ -121,7 +121,8 @@ public function json()
         try {
             return JsonTool::decode($this->body);
         } catch (Exception $e) {
-            throw new HttpSocketJsonException('Could not parse response as JSON.', $this, $e);
+            $contentType = $this->getHeader('content-type');
+            throw new HttpSocketJsonException("Could not parse HTTP response as JSON. Received Content-Type $contentType.", $this, $e);
         }
     }
 }