diff --git a/commands.tex b/commands.tex
index 2e43d64..8aa152a 100644
--- a/commands.tex
+++ b/commands.tex
@@ -24,7 +24,9 @@
 }
 
 \newcommand{\xkcd}[2]{\fig{xkcd/#1}{#1}{#2\\%
-        {\tiny\MakeUppercase{https://imgs.xkcd.com/comics/#1.png}}}}
+{\tiny\MakeUppercase{https://imgs.xkcd.com/comics/#1.png}\hskip3mm%
+License: \href{https://creativecommons.org/licenses/by-nc/2.5/}{CC BY-NC 2.5}%
+}}}
 
 % Usage: \svg{<path-to-file>}{<label>}{<caption>}
 \newcommand{\svg}[3]{
diff --git a/structure.tex b/structure.tex
index a06aba9..0512da3 100644
--- a/structure.tex
+++ b/structure.tex
@@ -39,6 +39,12 @@
 \usepackage{titling} % makes available \thetitle \theauthor \thedate
 \usepackage[toc,acronym,footnote,nomain]{glossaries} % Load the package with the acronym option
 \usepackage{chngcntr}
+\usepackage[unicode=false,
+    colorlinks=true,
+    linkcolor=darkgray,
+    citecolor=darkgray,
+    filecolor=darkgray,
+    urlcolor=darkgray]{hyperref} % https://en.wikibooks.org/wiki/LaTeX/Hyperlinks
 
 
 \bibliographystyle{unsrtnat} %styles list https://www.sharelatex.com/learn/Natbib_bibliography_styles