diff --git a/tikz/commutative-diagram-2/commutative-diagram-2.tex b/tikz/commutative-diagram-2/commutative-diagram-2.tex
index 023bcf6..3c9421c 100644
--- a/tikz/commutative-diagram-2/commutative-diagram-2.tex
+++ b/tikz/commutative-diagram-2/commutative-diagram-2.tex
@@ -2,11 +2,10 @@
 \usepackage[pdftex,active,tightpage]{preview}
 \setlength\PreviewBorder{2mm}
 \usepackage{tikz}
-\usetikzlibrary{arrows,positioning,fit,shapes} 
 
 \begin{document}
 \begin{preview}
-\begin{tikzpicture}[scale=1,node distance=2.0cm]
+\begin{tikzpicture}
     \node (Z) at (0,0) {$Z$};
     \node (Y) at (3,0) {$Y$};
     \node (X) at (1.5,-1.5) {$X$};