diff --git a/gscan2pdf.changes b/gscan2pdf.changes
index c8878fc..f158184 100644
--- a/gscan2pdf.changes
+++ b/gscan2pdf.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Wed Jan  6 13:42:51 UTC 2021 - ecsos <ecsos@opensuse.org>
+
+- Insert needed Requires:perl(Gtk3::ImageView).
+- Move djvulibre, tiff and pdftk from Reccommends to Requires, 
+  because missing of these package will rise up a warning at startup.
+
 -------------------------------------------------------------------
 Mon Jan  4 18:01:31 UTC 2021 - Carsten Ziepke <kieltux@gmail.com>
 
diff --git a/gscan2pdf.spec b/gscan2pdf.spec
index de2e7c1..b9c23a2 100644
--- a/gscan2pdf.spec
+++ b/gscan2pdf.spec
@@ -36,6 +36,7 @@ Requires:       perl(Glib)
 Requires:       perl(GooCanvas2)
 Requires:       perl(Gtk3)
 Requires:       perl(Gtk3::SimpleList)
+Requires:       perl(Gtk3::ImageView)
 Requires:       perl(Image::Magick)
 Requires:       perl(Image::Sane)
 Requires:       perl(List::MoreUtils)
@@ -50,11 +51,11 @@ Requires:       typelib(GooCanvas) = 2.0
 %if 0%{?sle_version} >= 150200 && 0%{?is_opensuse} || 0%{?sle_version} >= 150200 || 0%{?suse_version} > 1500
 Requires:       typelib(GdkPixdata) = 2.0
 %endif
-Recommends:     djvulibre
+Requires:       djvulibre
+Requires:       tiff
+Requires:       pdftk
 Recommends:     gocr
 Recommends:     tesseract-ocr
-Recommends:     tiff
-Recommends:     pdftk
 BuildArch:      noarch
 %{perl_requires}