diff --git a/Build.PL b/Build.PL
index de100cfa8..a7e38767c 100644
--- a/Build.PL
+++ b/Build.PL
@@ -14,7 +14,7 @@ my $build = Module::Build->new(
         'Math::ConvexHull'          => '1.0.4',
         'Math::Geometry::Voronoi'   => '1.3',
         'Math::PlanePath'           => '53',
-        'Moo'                       => '0',
+        'Moo'                       => '0.091009',
         'perl'                      => '5.10.0',
         'Scalar::Util'              => '0',
         'Time::HiRes'               => '0',
diff --git a/lib/Slic3r.pm b/lib/Slic3r.pm
index f299921bf..e534403d4 100644
--- a/lib/Slic3r.pm
+++ b/lib/Slic3r.pm
@@ -24,7 +24,7 @@ BEGIN {
 use FindBin;
 our $var = "$FindBin::Bin/var";
 
-use Moo;
+use Moo 0.091009;
 use Slic3r::Config;
 use Slic3r::ExPolygon;
 use Slic3r::Extruder;