diff -bu ./lib/PPI/Dumper.pm~ ./lib/PPI/Dumper.pm
--- ./lib/PPI/Dumper.pm~	2017-05-14 16:49:54.000000000 +0200
+++ ./lib/PPI/Dumper.pm	2017-05-27 08:03:29.000000000 +0200
@@ -123,7 +123,8 @@
 		}, $class;
 
 	# Handle the options
-	my %options = map { lc $_ } @_;
+	my @options = map { lc $_ } @_; # strict hashpairs
+	my %options = @options;
 	foreach ( keys %{$self->{display}} ) {
 		if ( exists $options{$_} ) {
 			if ( $_ eq 'indent' ) {