diff --git a/gap-toolsforhomalg.spec b/gap-toolsforhomalg.spec
index 06f4d09..f3148b6 100644
--- a/gap-toolsforhomalg.spec
+++ b/gap-toolsforhomalg.spec
@@ -26,7 +26,7 @@ Url:            http://homalg-project.github.io/homalg_project/ToolsForHomalg/
 
 #Git-Clone:	git://github.com/homalg-project/ToolsForHomalg
 #Git-Web:	https://github.com/homalg-project/ToolsForHomalg
-Source:         http://www.gap-system.org/pub/gap/gap4/tar.bz2/packages/ToolsForHomalg-%version.tar.bz2
+Source:         https://www.gap-system.org/pub/gap/gap4/tar.bz2/packages/ToolsForHomalg-%version.tar.bz2
 BuildArch:      noarch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildRequires:  fdupes