diff --git packages/core/lib/asciidoctor/js/opal_ext.rb packages/core/lib/asciidoctor/js/opal_ext.rb
index fe218fc..b2e5577 100644
--- packages/core/lib/asciidoctor/js/opal_ext.rb
+++ packages/core/lib/asciidoctor/js/opal_ext.rb
@@ -1,6 +1,7 @@
 require 'asciidoctor/js/opal_ext/kernel'
 require 'asciidoctor/js/opal_ext/file'
 require 'asciidoctor/js/opal_ext/match_data'
+require 'asciidoctor/js/opal_ext/array'
 require 'asciidoctor/js/opal_ext/string'
 require 'asciidoctor/js/opal_ext/uri'
 require 'asciidoctor/js/opal_ext/base64'
diff --git packages/core/lib/asciidoctor/js/opal_ext/array.rb packages/core/lib/asciidoctor/js/opal_ext/array.rb
new file mode 100644
index 0000000..d703dfc
--- /dev/null
+++ packages/core/lib/asciidoctor/js/opal_ext/array.rb
@@ -0,0 +1,11 @@
+class Array
+  alias :_original_pack :pack
+
+  def pack format
+    if format == 'm0'
+      ::Base64.strict_encode64 self
+    else
+      _original_pack self
+    end
+  end
+end
diff --git packages/core/lib/asciidoctor/js/postscript.rb packages/core/lib/asciidoctor/js/postscript.rb
index fe5f3bf..dca7397 100644
--- packages/core/lib/asciidoctor/js/postscript.rb
+++ packages/core/lib/asciidoctor/js/postscript.rb
@@ -4,3 +4,5 @@ require 'asciidoctor/extensions'
 
 require 'asciidoctor/js/asciidoctor_ext'
 require 'asciidoctor/js/opal_ext/logger' # override the built-in Logger
+
+Asciidoctor::InlineLinkRx = %r((^|link:|#{CG_BLANK}|\\?&lt;(?=\\?(?:https?|file|ftp|irc)(:))|[>\(\)\[\];"'])(\\?(?:https?|file|ftp|irc)://)(?:([^\s\[\]]+)\[(|#{CC_ALL}*?[^\\])\]|(?!\2)([^\s]*?)&gt;|([^\s\[\]<]*([^\s,.?!\[\]<\)]))))