diff --git a/script/public-inbox-learn b/script/public-inbox-learn
index 12a82de..b7f98dc 100755
--- a/script/public-inbox-learn
+++ b/script/public-inbox-learn
@@ -20,7 +20,7 @@
 
 See public-inbox-learn(1) man page for full documentation.
 EOF
-use strict;
+use v5.12;
 use PublicInbox::Config;
 use PublicInbox::InboxWritable;
 use PublicInbox::Eml;