diff --git a/lib/Amazon/Site.pm b/lib/Amazon/Site.pm
index 7b28297..2e77c32 100644
--- a/lib/Amazon/Site.pm
+++ b/lib/Amazon/Site.pm
@@ -22,6 +22,9 @@ Amazon::Site - A class to represent an Amazon site
 
 =cut
 
+use strict;
+use warnings;
+
 use Feature::Compat::Class;
 
 use feature 'signatures';
diff --git a/lib/Amazon/Sites.pm b/lib/Amazon/Sites.pm
index 39a12a8..933cff1 100644
--- a/lib/Amazon/Sites.pm
+++ b/lib/Amazon/Sites.pm
@@ -28,6 +28,9 @@ A simple class that encapsulates information about Amazon sites.
 
 =cut
 
+use strict;
+use warnings;
+
 use Feature::Compat::Class;
 
 use feature 'signatures';