diff --git a/src/jpacrepo_uploader/uploader.py b/src/jpacrepo_uploader/uploader.py
index f52b3bc..bd993a1 100644
--- a/src/jpacrepo_uploader/uploader.py
+++ b/src/jpacrepo_uploader/uploader.py
@@ -336,15 +336,15 @@ def main() -> None:
                         action='store_true',
                         help="Enable verbose output")
     parser.add_argument('-0', '--http1.0',
-                        default=True,
+                        default=False,
                         action='store_true',
                         help="Force HTTP/1.1 protocol")
     parser.add_argument('-1', '--http1.1',
-                        default=True,
+                        default=False,
                         action='store_true',
                         help="Force HTTP/1.1 protocol")
     parser.add_argument('-2', '--http2',
-                        default=True,
+                        default=False,
                         action='store_true',
                         help="Enable HTTP/2 protocol")
     parser.add_argument('-3', '--http3',