diff --git a/cpanfile b/cpanfile
index fb0182a..9cde4cd 100644
--- a/cpanfile
+++ b/cpanfile
@@ -5,6 +5,7 @@ requires 'Encode';
 requires 'UNIVERSAL::require';
 requires 'XML::LibXML', '1.66';
 requires 'XML::LibXML::XPathContext';
+requires 'perl', '5.8.1';
 
 on build => sub {
     requires 'ExtUtils::MakeMaker', '6.36';