diff --git a/lib/PsN.pm b/lib/PsN.pm
index 7bdeb960..823e6b8c 100644
--- a/lib/PsN.pm
+++ b/lib/PsN.pm
@@ -10,7 +10,7 @@ our ($dev,$version,$lib_dir,$config_file,$config,$Rscripts_dir);
 #the version line is extracted in Makefile using regular expression
 # /\$version\s*=\s*.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*.;/
 # so be careful when you edit!!!
-$version = '5.3.2';
+$version = '5.4.0';
 
 # The following line will be changed by make
 $dev = 1;