diff --git a/draft.tex b/draft.tex
index ffcc002..6c7105e 100644
--- a/draft.tex
+++ b/draft.tex
@@ -121,7 +121,7 @@
 
 \allowdisplaybreaks
 
-\preprint{ZU-TH-}
+\preprint{ZU-TH-15/18}
 \title{Towards establishing Lepton Flavour Universality violation in $\bar{B}\to \bar{K}^*\ell^+\ell^-$ decays}
 %\title{Novel approach for probing Lepton Flavour Universality in $B\to K^*\ell^+\ell^-$ decays}
 %\title{Probing Lepton Flavour Universality in $B\to K^*\ell^+\ell^-$ decays}