diff --git a/Build.PL b/Build.PL
index 84609f81..24dc5b13 100644
--- a/Build.PL
+++ b/Build.PL
@@ -21,7 +21,7 @@ Module::Build->new(
   test_requires => {
     'Test::More' => '0.88',
     'PPI' => '0',
-    'Class:ISA' => '0',
+    'Class::ISA' => '0',
     'Module::Info' => '0',
     'Module::Load' => '0',
     'File::Slurp' => '0',