diff --git a/mddatasetbuilder/__main__.py b/mddatasetbuilder/__main__.py
index fbc364b..03c4b37 100644
--- a/mddatasetbuilder/__main__.py
+++ b/mddatasetbuilder/__main__.py
@@ -1,3 +1,4 @@
+"""Module entry point."""
 from .datasetbuilder import _commandline
 
 if __name__ == "__main__":