lib/PublicInbox/Qspawn.pm | 6 ++----

diff --git a/lib/PublicInbox/Qspawn.pm b/lib/PublicInbox/Qspawn.pm
index f2beb4b21febc96f8a22862f835a3ffc1244e405..c2d8fd732c7a0ddf6696f7bd6316e0536dc0776f 100644
--- a/lib/PublicInbox/Qspawn.pm
+++ b/lib/PublicInbox/Qspawn.pm
@@ -25,8 +25,7 @@ # git-http-backend(1) process (for "git clone") as well as short-lived
 # processes such as git-apply(1).
 
 package PublicInbox::Qspawn;
-use strict;
-use v5.10.1;
+use v5.12;
 use PublicInbox::Spawn qw(popen_rd);
 use PublicInbox::GzipFilter;
 
@@ -332,8 +331,7 @@ 	}
 }
 
 package PublicInbox::Qspawn::Limiter;
-use strict;
-use warnings;
+use v5.12;
 
 sub new {
 	my ($class, $max) = @_;