diff -r 71fc4a7a7039 -r bd551ede2be6 graphics.sty
--- a/graphics.sty	Fri Jun 01 15:28:37 2018 +0100
+++ b/graphics.sty	Fri Jun 01 16:19:26 2018 +0100
@@ -10,7 +10,7 @@
 \usepackage{graphicx} 
 \usepackage{pgfplots}
 
-\pgfplotsset{compat=1.11}
+\pgfplotsset{compat=1.15}
 
 \newenvironment{bubble}[1][]{%
 \addtolength{\leftmargini}{4mm}%