diff --git a/src/msghandler.jl b/src/msghandler.jl
index 7694d33..6ac75fa 100644
--- a/src/msghandler.jl
+++ b/src/msghandler.jl
@@ -1125,7 +1125,7 @@ function plik_oneshot_upload(file_server_url::String, filepath::String)
   url_getUploadID = "$file_server_url/upload" # URL to get upload ID
   headers = ["Content-Type" => "application/json"]
   body = """{ "OneShot" : true }"""
-  http_response = HTTP.request("POST", url_getUploadID, headers, body; body_is_form=false)
+  http_response = HTTP.request("POST", url_getUploadID, headers, body)
   response_json = JSON.parse(http_response.body)
 
   uploadid = response_json["id"]