diff --git a/Build.PL b/Build.PL
index 6e5028f6..101511c4 100644
--- a/Build.PL
+++ b/Build.PL
@@ -1,4 +1,7 @@
+#!/usr/bin/perl
+
 use Module::Build qw();
+
 my $builder = Module::Build->new(
     module_name       => 'NGCP-Schema',
     license           => 'GPL_3',
diff --git a/t/compile.t b/t/compile.t
index 71f88385..b8c4695c 100644
--- a/t/compile.t
+++ b/t/compile.t
@@ -1,3 +1,5 @@
+#!/usr/bin/perl
+
 use Sipwise::Base '-skip'=>['TryCatch'];
 use blib 'blib';
 use File::ShareDir qw(dist_file);
diff --git a/tools/render_schema.pl b/tools/render_schema.pl
index ecb54975..e1c96e94 100644
--- a/tools/render_schema.pl
+++ b/tools/render_schema.pl
@@ -1,3 +1,4 @@
+#!/usr/bin/perl
 
 BEGIN {
     unshift(@INC,'../lib');