diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index d1ac30d4f22d..cbb7725969f7 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -10281,10 +10281,10 @@ let self = _self // overrides; _self = with self; {
   };
 
   Readonly = buildPerlModule rec {
-    name = "Readonly-2.01";
+    name = "Readonly-2.04";
     src = fetchurl {
       url = "mirror://cpan/authors/id/S/SA/SANKO/${name}.tar.gz";
-      sha256 = "ec7076c6851b6d3338e959645cd995343241f5b20000ffc29519faf28f6b482e";
+      sha256 = "2221243758afde3b3238d1325b9c32bf1b4d0b4d11065920c03408b2645c93b6";
     };
     buildInputs = [ ModuleBuildTiny ];
     meta = {