diff --git a/cleanthesis.pdf b/cleanthesis.pdf
index 10b2b4d..fef3a73 100644
Binary files a/cleanthesis.pdf and b/cleanthesis.pdf differ
diff --git a/cleanthesis.sty b/cleanthesis.sty
index 31bc612..710a264 100644
--- a/cleanthesis.sty
+++ b/cleanthesis.sty
@@ -111,6 +111,11 @@
 \define@key[ct]{cthesis}{bibfile}[bib-refs]{\def\cthesis@bibfile{#1}}
 \setkeys[ct]{cthesis}{bibfile=bib-refs}
 
+% OPTION bibstyle
+% --> values = alphabetic|numeric
+\define@choicekey*[ct]{cthesis}{bibstyle}[\val\bibstylenr]{alphabetic,numeric}[alphabetic]{\def\cthesis@bibstyle{#1}}
+\setkeys[ct]{cthesis}{bibstyle=alphabetic}
+
 
 \DeclareOptionX*{
 	\PackageWarning{cleanthesis}{Unknown option ‘\CurrentOption’}%
@@ -295,7 +300,7 @@
 \RequirePackage[					% use biblatex for bibliography
 	backend=\cthesis@bibsys,		% 	- use biber backend (bibtex replacement) or bibtex
 	bibencoding=utf8,				% 	- use auto file encode
-	style=alphabetic,				% 	- use alphabetic (or numeric) bib style
+	style=\cthesis@bibstyle,		% 	- use alphabetic (or numeric) bib style
 	natbib=true,					% 	- allow natbib commands
 	hyperref=true,					% 	- activate hyperref support
 	backref=true,					% 	- activate backrefs
diff --git a/cleanthesis.tex b/cleanthesis.tex
index fdc6ffd..bd30434 100644
--- a/cleanthesis.tex
+++ b/cleanthesis.tex
@@ -145,6 +145,11 @@ The default (still) is \texttt{bibtex}.
 Sets the file name of the bibtex file used for the bibliography.
 If this option is not used (defined), the package looks for the default bibliography \texttt{bib-refs.bib}.
 
+\optitem[alphabetic]{bibstyle}{\opt{alphabetic},\opt{numeric}}
+
+Sets whether to use an \texttt{alphabetic} or a \texttt{numeric} reference style for the bibliography.
+The default is \texttt{alphabetic}.
+
 \end{optionlist}
 
 \end{document}
diff --git a/thesis-example.pdf b/thesis-example.pdf
index 0a783f5..7fb2849 100644
Binary files a/thesis-example.pdf and b/thesis-example.pdf differ