diff --git a/Build.PL b/Build.PL
index d695694..8504c7a 100644
--- a/Build.PL
+++ b/Build.PL
@@ -144,9 +144,9 @@ my $builder = GSLBuilder->new(
     },
     sign                  => 0,
     configure_requires => {
-        'PkgConfig'       => '0.07720',
-        'Module::Build'   => '0.38',
-        'Math::GSL::Alien'      => '1.01',
+        'PkgConfig'         => '0.07720',
+        'Module::Build'     => '0.38',
+        'Math::GSL::Alien'  => '1.03',
     },
     swig_version          => $swig_version,
     current_version       => $gsl_conf->{gsl_version},
diff --git a/lib/Math/GSL.pm b/lib/Math/GSL.pm
index fb70adb..fdc5a80 100644
--- a/lib/Math/GSL.pm
+++ b/lib/Math/GSL.pm
@@ -26,7 +26,7 @@ our %EXPORT_TAGS = ( all => \@EXPORT_OK, );
 
 our ($GSL_PREC_DOUBLE, $GSL_PREC_SINGLE, $GSL_PREC_APPROX ) = 0 .. 2;
 our $GSL_MODE_DEFAULT = $GSL_PREC_DOUBLE;
-our $VERSION = '0.45';
+our $VERSION = '0.47';
 
 =head1 NAME
 
@@ -34,7 +34,7 @@ Math::GSL - Perl interface to the GNU Scientific Library (GSL)
 
 =head1 VERSION
 
-Version 0.45
+Version 0.47
 
 =head1 SYNOPSIS