--- rpl/configure.ac	2017/06/17 10:53:41	1.187
+++ rpl/configure.ac	2017/06/20 15:39:11	1.188
@@ -11,7 +11,7 @@ dnl Libraries
 NCURSES=ncurses-6.0
 READLINE=readline-7.0
 UNITS=units-2.13
-GSL=gsl-2.3
+GSL=gsl-2.4
 GPP=gpp-3.0
 GNUPLOT=gnuplot-5.0.5
 FILE=file-5.29