diff --git a/svn_mirror/git_to_svn.py b/svn_mirror/git_to_svn.py
index c9bc1d7..df7dd57 100644
--- a/svn_mirror/git_to_svn.py
+++ b/svn_mirror/git_to_svn.py
@@ -373,6 +373,7 @@ def sync_git_to_svn(mirror: Mirror) -> int:
 
 
 def _sync_git_to_svn_impl(mirror: Mirror) -> int:
+    auth_args = mirror.config.svn.auth_args()
     git_dir = str(mirror.canonical_dir)
     svn_cfg = mirror.config.svn
     count = 0
@@ -402,7 +403,7 @@ def _sync_git_to_svn_impl(mirror: Mirror) -> int:
             result = _run_svn(
                 ["commit", "--file", "-", "--username", svn_username],
                 input=message.encode("utf-8"),
-                wc=wc, timeout=120,
+                wc=wc, timeout=120, auth_args=auth_args,
             )
             new_rev = _parse_commit_revision(result)
 
@@ -449,7 +450,7 @@ def _sync_git_to_svn_impl(mirror: Mirror) -> int:
             result = _run_svn(
                 ["copy", "-r", str(source_rev), src_url, dst_url,
                  "-m", message, "--username", svn_username],
-                timeout=120,
+                timeout=120, auth_args=auth_args,
             )
             new_rev = _parse_commit_revision(result)