diff --git a/src/img2pdf.py b/src/img2pdf.py
index 859b5b9..13bb5b6 100755
--- a/src/img2pdf.py
+++ b/src/img2pdf.py
@@ -1142,8 +1142,12 @@ class pdfdoc(object):
             catalog[PdfName.PageLayout] = PdfName.TwoColumnLeft
         elif self.page_layout == PageLayout.twopageright:
             catalog[PdfName.PageLayout] = PdfName.TwoPageRight
+            if self.output_version < "1.5":
+                self.output_version = "1.5"
         elif self.page_layout == PageLayout.twopageleft:
             catalog[PdfName.PageLayout] = PdfName.TwoPageLeft
+            if self.output_version < "1.5":
+                self.output_version = "1.5"
         elif self.page_layout is None:
             pass
         else: