diff --git a/src/pipdeptree/__main__.py b/src/pipdeptree/__main__.py
index 5059487..c581f3d 100644
--- a/src/pipdeptree/__main__.py
+++ b/src/pipdeptree/__main__.py
@@ -8,8 +8,7 @@ from pipdeptree._discovery import get_installed_distributions
 from pipdeptree._models import PackageDAG
 from pipdeptree._non_host import handle_non_host_target
 from pipdeptree._render import render
-
-from ._validate import validate
+from pipdeptree._validate import validate
 
 
 def main(args: Sequence[str] | None = None) -> None | int: