diff --git a/Build.PL b/Build.PL
index afe02bc..6baf488 100755
--- a/Build.PL
+++ b/Build.PL
@@ -8,12 +8,14 @@ my $build = Module::Build->new
      module_name => 'optimize',
      license => 'unknown',
      dynamic_config => 1,
-     requires => 
-     { 
-	 Hook::Scope => '0.02',
+     requires =>
+     {
+	 'perl'        => '5.008',
+         'Attribute::Handlers' => 0,
 	 'B::Generate' => '1.05',
+         'B::Utils'    => 0,
+	 'Hook::Scope' => '0.02',
 	 'optimizer'   => '0.02',
-	 'perl' => '5.008',
      }
      );
 $build->create_build_script();
diff --git a/Changes b/Changes
index f87d202..6a253b0 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,8 @@
 Revision history for Perl extension optimize
 
+0.03_02 2011-03-01 rurban
+    - added missing requirements
+
 0.03_01 2011-02-19 rurban
     - enabled register/unregister
     - stablized 11-integer left shift test
diff --git a/Makefile.PL b/Makefile.PL
index 85c5438..bab2a90 100755
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -7,7 +7,11 @@ WriteMakefile
    'PREREQ_PM'	=>
    {
     'DynaLoader'  => 0,
-    'B::Generate' => '1.34'
+    'Attribute::Handlers' => 0,
+    'B::Generate' => '1.34',
+    'B::Utils'    => 0,
+    'Hook::Scope' => '0.02',
+    'optimizer'   => '0.02',
    },
    AUTHOR        => 'Arthur Bergman',
    ($ExtUtils::MakeMaker::VERSION gt '6.46' ?
diff --git a/lib/optimize.pm b/lib/optimize.pm
index 0ff4b48..275c260 100644
--- a/lib/optimize.pm
+++ b/lib/optimize.pm
@@ -7,7 +7,7 @@ use B::Utils qw(walkallops_simple);
 use B qw(OPf_KIDS OPf_MOD OPf_PARENS OPf_WANT_SCALAR OPf_STACKED);
 use Attribute::Handlers;
 use Hook::Scope qw(POST);
-our $VERSION = "0.03_01";
+our $VERSION = "0.03_02";
 
 our %pads;
 our $state;