diff --git a/Changes b/Changes
index edce0c9..099a7f8 100644
--- a/Changes
+++ b/Changes
@@ -1,9 +1,11 @@
 Revision history for XML-Printer-ESCPOS
 
-0.05    2017-04-22
+0.05    2017-04-24
     - Added repeat tag.
     - Added tags set and unset for defining global defaults.
     - Added justify tag.
+    - Added hr tag.
+    - Improved image tag to not only allow png, but also jpeg and gif. Added tests.
 
 0.03    2017-02-15
     - Added automatic word wrapping for simple <text> and for <utf8ImagedText>.
diff --git a/MANIFEST b/MANIFEST
index 4ddad53..60a8e72 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -22,7 +22,12 @@ t/12-tab-positions.t
 t/13-repeat.t
 t/14-set-unset.t
 t/15-justify.t
+t/16-hr.t
 t/manifest.t
 t/pod-coverage.t
 t/pod.t
 t/lib/Mock/Printer/ESCPOS.pm
+t/images/arrow.png
+t/images/arrow.pdf
+t/images/arrow.gif
+t/images/arrow.jpg
diff --git a/lib/XML/Printer/ESCPOS.pm b/lib/XML/Printer/ESCPOS.pm
index dd1975a..2938147 100644
--- a/lib/XML/Printer/ESCPOS.pm
+++ b/lib/XML/Printer/ESCPOS.pm
@@ -20,7 +20,7 @@ template engine of your choice.
 
 =cut
 
-our $VERSION = '0.04';
+our $VERSION = '0.05';
 
 =head1 SYNOPSIS
 
diff --git a/lib/XML/Printer/ESCPOS/Debug.pm b/lib/XML/Printer/ESCPOS/Debug.pm
index 4be4b01..55560a7 100644
--- a/lib/XML/Printer/ESCPOS/Debug.pm
+++ b/lib/XML/Printer/ESCPOS/Debug.pm
@@ -4,7 +4,7 @@ use strict;
 use warnings;
 use Data::Dumper;
 
-our $VERSION = '0.04';
+our $VERSION = '0.05';
 
 our $AUTOLOAD;
 
diff --git a/lib/XML/Printer/ESCPOS/Tags.pm b/lib/XML/Printer/ESCPOS/Tags.pm
index 5fda3a1..430accc 100644
--- a/lib/XML/Printer/ESCPOS/Tags.pm
+++ b/lib/XML/Printer/ESCPOS/Tags.pm
@@ -6,7 +6,7 @@ use Text::Wrapper;
 use GD;
 
 
-our $VERSION = '0.04';
+our $VERSION = '0.05';
 
 =head2 new
 
@@ -51,6 +51,7 @@ sub tag_allowed {
         upsideDown
         utf8ImagedText
         justify
+        hr
         /;
 }
 
@@ -387,24 +388,33 @@ sub _image {
         return $self->{caller}->_set_error_message("wrong image tag usage") if scalar keys %{ $params->[0] } != 1;
         return $self->{caller}->_set_error_message("wrong image tag usage") if not exists $params->[0]->{filename};
         $filename = $params->[0]->{filename};
-        return 1;
     }
-
-    # content tag form <image>image.jpg</image>
-    return $self->{caller}->_set_error_message("wrong image tag usage") if @$params != 3;
-    return $self->{caller}->_set_error_message("wrong image tag usage") if ref $params->[0] ne 'HASH';
-    return $self->{caller}->_set_error_message("wrong image tag usage") if %{ $params->[0] };
-    return $self->{caller}->_set_error_message("wrong image tag usage") if $params->[1] ne '0';
-    $filename = $params->[2];
+    else {
+        # content tag form <image>image.jpg</image>
+        return $self->{caller}->_set_error_message("wrong image tag usage") if @$params != 3;
+        return $self->{caller}->_set_error_message("wrong image tag usage") if ref $params->[0] ne 'HASH';
+        return $self->{caller}->_set_error_message("wrong image tag usage") if %{ $params->[0] };
+        return $self->{caller}->_set_error_message("wrong image tag usage") if $params->[1] ne '0';
+        $filename = $params->[2];
+    }
 
     return $self->{caller}->_set_error_message("wrong image tag usage: file does not exist") if !-f $filename;
 
-    my $image = GD::Image->newFromPng($filename) or return $self->{caller}->_set_error_message("Error loading image file $filename");
+    my $image;
+    if ($filename =~ m/\.png$/) {
+        $image = GD::Image->newFromPng($filename) or return $self->{caller}->_set_error_message("Error loading image file $filename");
+    }
+    elsif ($filename =~ m/\.gif$/) {
+        $image = GD::Image->newFromGif($filename) or return $self->{caller}->_set_error_message("Error loading image file $filename");
+    }
+    elsif ($filename =~ m/\.jpe?g$/) {
+        $image = GD::Image->newFromJpeg($filename) or return $self->{caller}->_set_error_message("Error loading image file $filename");
+    }
+    else {
+        return $self->{caller}->_set_error_message("wrong image tag usage: file format not supported");
+    }
 
-    $self->{printer}->print();
     $self->{printer}->image( $image );
-    $self->{printer}->print();
-
     return 1;
 }
 
@@ -480,6 +490,39 @@ sub _unset {
     return 1;
 }
 
+=head2 _hr
+
+Adds a horizontal line. Use the I<thickness> attribute to set the line's thickness. Defaults to 2.
+
+=cut
+
+sub _hr {
+    my ( $self, $params ) = @_;
+    return $self->{caller}->_set_error_message("wrong hr tag usage") if @$params != 1;
+    return $self->{caller}->_set_error_message("wrong hr tag usage") if ref $params->[0] ne 'HASH';
+    my $thickness = 2;
+    if ( %{ $params->[0] } ) {
+        my @keys = keys %{ $params->[0] };
+        return $self->{caller}->_set_error_message("wrong hr tag usage") if !@keys;
+        $thickness = $params->[0]->{thickness};
+        return $self->{caller}->_set_error_message("wrong hr tag usage") if !$thickness;
+        return $self->{caller}->_set_error_message("wrong hr tag usage: thickness attribute must be a positive integer")
+            if $thickness !~ /^\d+$/ or $thickness < 1;
+    }
+
+    my $width = $params->[0]->{width} || $self->{paperWidth} || $self->{print_area_width} || 512;
+    my $img = GD::Image->new( $width, $thickness );
+    my $black = $img->colorAllocate( 0, 0, 0 );
+
+    for my $line ( 1 .. $thickness ) {
+        $img->line( 0, $line, $width, $line, $black );
+    }
+
+    $self->{printer}->image($img);
+
+    return 1;
+}
+
 =head2 _tabpositions
 
 Sets horizontal tab positions for tab stops. Syntax for XML is the following:
diff --git a/t/07-images.t b/t/07-images.t
index 0efdab3..99f2791 100644
--- a/t/07-images.t
+++ b/t/07-images.t
@@ -7,44 +7,57 @@ use XML::Printer::ESCPOS;
 use lib 't/lib';
 use Mock::Printer::ESCPOS;
 
-plan skip_all => 'image tests must be rewritten, add sample image files to work with';
+plan tests => 22;
 
-my $mockprinter = Mock::Printer::ESCPOS->new();
-my $parser = XML::Printer::ESCPOS->new( printer => $mockprinter );
-
-my $ret = $parser->parse(
-    q#
+my @filenames = ("t/images/arrow.png", "t/images/arrow.gif", "t/images/arrow.jpg");
+for my $filename (@filenames) {
+    my @xmls = (
+        q#
             <escpos>
-              <image filename="header.gif" />
+              <image filename="# . $filename . q#" />
+            </escpos>
+        #,
+        q#
+            <escpos>
+              <image># . $filename . q#</image>
             </escpos>
         #
-);
-ok $ret => 'parsing successful';
-is $parser->errormessage(), undef, 'errormessage is empty';
-my $calls = $mockprinter->{calls};
-ok( (          ref $calls eq 'ARRAY'
-            or @$calls == 1
-            or ref $calls->[0] eq 'ARRAY'
-            or @{ $calls->[0] } == 2
-            or $calls->[0]->[1] eq 'image'
-            or ref $calls->[0]->[2] eq 'GD::Image'
-    ),
-    'XML translated correctly'
-);
+    );
 
-$mockprinter = Mock::Printer::ESCPOS->new();
-$parser = XML::Printer::ESCPOS->new( printer => $mockprinter );
+    for my $xml (@xmls) {
+        my $mockprinter = Mock::Printer::ESCPOS->new();
+        my $parser = XML::Printer::ESCPOS->new( printer => $mockprinter );
 
-$ret = $parser->parse(
+        my $ret = $parser->parse($xml);
+        ok $ret => 'parsing successful';
+        is $parser->errormessage(), undef, 'errormessage is empty';
+        my $calls = $mockprinter->{calls};
+        ok( (          ref $calls eq 'ARRAY'
+                    and @$calls == 1
+                    and ref $calls->[0] eq 'ARRAY'
+                    and @{$calls->[0]} == 2
+                    and $calls->[0]->[0] eq 'image'
+                    and ref $calls->[0]->[1] eq 'GD::Image'
+                    and $calls->[0]->[1]->height == 60
+                    and $calls->[0]->[1]->width == 83
+            ),
+            'XML translated correctly'
+        );
+    }
+}
+
+my $mockprinter = Mock::Printer::ESCPOS->new();
+my $parser = XML::Printer::ESCPOS->new( printer => $mockprinter );
+
+my $ret = $parser->parse(
     q#
             <escpos>
-              <image>header.gif</image>
+              <image size="23">t/images/arrow.png</image>
             </escpos>
         #
 );
-ok $ret => 'parsing successful';
-is $parser->errormessage(), undef, 'errormessage is empty';
-is_deeply $mockprinter->{calls}, [ [ image => 'header.gif' ] ], 'XML translated correctly';
+is $ret, undef, 'parsing stopped';
+is $parser->errormessage() => 'wrong image tag usage', 'correct error message';
 
 $mockprinter = Mock::Printer::ESCPOS->new();
 $parser = XML::Printer::ESCPOS->new( printer => $mockprinter );
@@ -52,9 +65,9 @@ $parser = XML::Printer::ESCPOS->new( printer => $mockprinter );
 $ret = $parser->parse(
     q#
             <escpos>
-              <image size="23">header.gif</image>
+              <image filename="t/images/arrow.pdf" />
             </escpos>
         #
 );
 is $ret, undef, 'parsing stopped';
-is $parser->errormessage() => 'wrong image tag usage', 'correct error message';
+is $parser->errormessage() => 'wrong image tag usage: file format not supported', 'correct error message';
diff --git a/t/16-hr.t b/t/16-hr.t
new file mode 100644
index 0000000..c3cf3a5
--- /dev/null
+++ b/t/16-hr.t
@@ -0,0 +1,85 @@
+#!perl -T
+use 5.006;
+use strict;
+use warnings;
+use Test::More;
+use XML::Printer::ESCPOS;
+use lib 't/lib';
+use Mock::Printer::ESCPOS;
+
+plan tests => 12;
+
+my $mockprinter = Mock::Printer::ESCPOS->new();
+my $parser = XML::Printer::ESCPOS->new( printer => $mockprinter );
+
+my $ret = $parser->parse(
+    q#
+            <escpos>
+              <text>text</text>
+              <hr />
+              <text>text</text>
+            </escpos>
+        #
+);
+ok $ret => 'parsing successful';
+is $parser->errormessage(), undef, 'errormessage is empty';
+my $calls = $mockprinter->{calls};
+ok( (          ref $calls eq 'ARRAY'
+            and @$calls == 3
+            and ref $calls->[0] eq 'ARRAY'
+            and is_deeply $calls->[0], [ text => 'text' ]
+            and ref $calls->[1] eq 'ARRAY'
+            and @{$calls->[1]} == 2
+            and $calls->[1]->[0] eq 'image'
+            and ref $calls->[1]->[1] eq 'GD::Image'
+            and ref $calls->[2] eq 'ARRAY'
+            and is_deeply $calls->[2], [ text => 'text' ]
+    ),
+    'XML translated correctly'
+);
+
+
+$mockprinter = Mock::Printer::ESCPOS->new();
+$parser = XML::Printer::ESCPOS->new( printer => $mockprinter );
+
+$ret = $parser->parse(
+    q#
+            <escpos>
+              <text>text</text>
+              <hr thickness="3" />
+              <text>text</text>
+            </escpos>
+        #
+);
+ok $ret => 'parsing successful';
+is $parser->errormessage(), undef, 'errormessage is empty';
+$calls = $mockprinter->{calls};
+ok( (          ref $calls eq 'ARRAY'
+            and @$calls == 3
+            and ref $calls->[0] eq 'ARRAY'
+            and is_deeply $calls->[0], [ text => 'text' ]
+            and ref $calls->[1] eq 'ARRAY'
+            and @{$calls->[1]} == 2
+            and $calls->[1]->[0] eq 'image'
+            and ref $calls->[1]->[1] eq 'GD::Image'
+            and ref $calls->[2] eq 'ARRAY'
+            and is_deeply $calls->[2], [ text => 'text' ]
+    ),
+    'XML translated correctly'
+);
+
+
+$mockprinter = Mock::Printer::ESCPOS->new();
+$parser = XML::Printer::ESCPOS->new( printer => $mockprinter );
+
+$ret = $parser->parse(
+    q#
+            <escpos>
+              <text>text</text>
+              <hr thickness="a" />
+              <text>text</text>
+            </escpos>
+        #
+);
+is $ret, undef, 'parsing stopped';
+is $parser->errormessage() => 'wrong hr tag usage: thickness attribute must be a positive integer', 'correct error message';
\ No newline at end of file
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diff --git a/t/images/arrow.pdf b/t/images/arrow.pdf
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