diff --git a/README.txt b/README.txt
index f5bd44d58a1ae5810969386c5a34128be263250c..8c527ae53151f83c0e8483456c1fdd8cfd57edfb 100644
--- a/README.txt
+++ b/README.txt
@@ -24,6 +24,10 @@ triplets and Runge-Kutta methods applied to solve an optimal
 boundary control problem for the discrete 1D heat equation compared
 with a computed exact discrete solution.
 
+The latest version is available at
+
+  https://git-ce.rwth-aachen.de/jens.lang/LangSchmittOptCtr1DHeat.git
+
 Detailed descriptions of the methods and the problem are available
 online, the papers [1,2,3] with Open Access.