diff --git a/project.py b/project.py
index f98d293e5..6a186aa1d 100644
--- a/project.py
+++ b/project.py
@@ -3874,7 +3874,7 @@ class Project:
     def _IsValidBundle(self, path, quiet):
         try:
             with open(path, "rb") as f:
-                if f.read(16) == b"# v2 git bundle\n":
+                if f.read(16) in (b"# v2 git bundle\n", b"# v3 git bundle\n"):
                     return True
                 else:
                     if not quiet: