diff --git a/src/onegov/winterthur/app.py b/src/onegov/winterthur/app.py
index 0149e9ce4b..44a1970738 100644
--- a/src/onegov/winterthur/app.py
+++ b/src/onegov/winterthur/app.py
@@ -167,6 +167,11 @@ def get_shift_schedule_image(self) -> BytesIO | None:
                     '-sDEVICE=png16m',
                     f'-sOutputFile={path / "preview.png"}',
 
+                    # force landscape orientation in postscript
+                    '-c',
+                    '<</Orientation 3>> setpagedevice',
+                    '-f',
+
                     # from pdf
                     str(path / 'input.pdf')
                 ))