diff --git a/superconductivity_assignment3_kvkempen.tex b/superconductivity_assignment3_kvkempen.tex
index 90f6f01..49fb293 100755
--- a/superconductivity_assignment3_kvkempen.tex
+++ b/superconductivity_assignment3_kvkempen.tex
@@ -32,6 +32,7 @@
 \usepackage{todonotes}
 \setuptodonotes{inline}
 \usepackage{mhchem}
+\usepackage{listings}
 
 \newcommand{\pfrac}[2]{\frac{\partial #1}{\partial #2}}
 
@@ -131,11 +132,14 @@ This is very close to what is written in the assignment, but not precisely the s
 \section{Critical currents}
 
 \section{A weak junction}
-
+See the code in appendix \ref{appendix:program-task-12}.
 
 \bibliographystyle{vancouver}
 \bibliography{references.bib}
 
-%\appendix
+\appendix
+\section{Program to task 12}
+\label{appendix:program-task-12}
+\lstinputlisting[language=python,breaklines=true]{ass3-12-a-weak-junction.py}
 
 \end{document}