diff --git a/revbank b/revbank
index 16390df..7238c08 100755
--- a/revbank
+++ b/revbank
@@ -2,8 +2,8 @@
 
 use v5.32;
 use warnings;
-use feature qw(signatures isa);
-no warnings "experimental::signatures";
+use experimental 'isa';         # stable since v5.36
+use experimental 'signatures';  # stable since v5.36
 
 use List::Util qw(uniq);
 use POSIX qw(ttyname);
@@ -16,7 +16,7 @@ use RevBank::Messages;
 use RevBank::Cart;
 use RevBank::Prompt;
 
-our $VERSION = "6.1.4";
+our $VERSION = "6.1.5";
 our %HELP1 = (
     "abort" => "Abort the current transaction",
 );