diff --git a/gap-gauss.spec b/gap-gauss.spec
index 03c47be..ba1e8ed 100644
--- a/gap-gauss.spec
+++ b/gap-gauss.spec
@@ -26,7 +26,7 @@ URL:            http://homalg-project.github.io/homalg_project/Gauss/
 
 #Git-Clone:	git://github.com/homalg-project/Gauss
 #Git-Web:	https://github.com/homalg-project/Gauss
-Source:         http://www.gap-system.org/pub/gap/gap4/tar.bz2/packages/Gauss-%version.tar.bz2
+Source:         https://www.gap-system.org/pub/gap/gap4/tar.bz2/packages/Gauss-%version.tar.bz2
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildRequires:  gap-devel >= 4.4
 BuildRequires:  gap-rpm-devel