diff --git a/Build.PL b/Build.PL
index cb5b94f..f6a0c4c 100644
--- a/Build.PL
+++ b/Build.PL
@@ -1,3 +1,6 @@
+use strict;
+use warnings;
+
 use Module::Build qw();
 my $builder = Module::Build->new(
     dist_name       => 'NGCP::BulkProcessor',
diff --git a/lib/NGCP/BulkProcessor/Projects/t/create_subscriber.t b/lib/NGCP/BulkProcessor/Projects/t/create_subscriber.t
index 52fced2..ede1fe2 100644
--- a/lib/NGCP/BulkProcessor/Projects/t/create_subscriber.t
+++ b/lib/NGCP/BulkProcessor/Projects/t/create_subscriber.t
@@ -1,3 +1,6 @@
+use strict;
+use warnings;
+
 use Net::Domain qw(hostfqdn);
 use JSON -support_by_pp, -no_export;
 use Test::More;