diff --git a/sources.list.d/rus-cert.sources b/sources.list.d/rus-cert.sources
new file mode 100644
index 0000000..281bc31
--- /dev/null
+++ b/sources.list.d/rus-cert.sources
@@ -0,0 +1,5 @@
+Types: deb deb-src
+URIs: http://deb.cert.uni-stuttgart.de/debian
+Suites: stable
+Components: main
+Signed-By: /etc/apt/single-keys/rus-cert.key