diff --git a/scripts/includes/GLPIAPI.py b/scripts/includes/GLPIAPI.py
index f2b57e4..39e147d 100644
--- a/scripts/includes/GLPIAPI.py
+++ b/scripts/includes/GLPIAPI.py
@@ -65,7 +65,7 @@ class GLPIAPI:
             "Content-Type":"Application/x-compress",
             "user-agent":self.UserAgent
         }
-        return requests.post(self.Server, headers=headers, json=inventory)
+        return requests.post(self.Server, headers=headers, data=inventory)
         
     def UpdateSerialNumber(self, deviceid, serialnumber):