diff --git a/README.md b/README.md
index f91ab85..ac76991 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,8 @@ matlab/octave functions and programming best practices.
 **Textbook:** Chapra, Steven, *Applied Numerical Methods with MATLAB for Engineers and
 Scientists* 3rd edition. 
 
-**Tools used:** [Matlab](https://www.mathworks.com/products/matlab.html), Octave, Github. 
+**Tools used:** [Matlab](https://www.mathworks.com/products/matlab.html), 
+[Octave](https://www.gnu.org/software/octave/) , [Github](https://github.com). 
 
 **Recommended tools:** Github Desktop, git, Atom (text editor), Vim (text editor), 
 Jupiter notebook (with matlab or octave kernel)