diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index d23ce520c172..7f38ddc7cf6d 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -1986,10 +1986,10 @@ let self = _self // overrides; _self = with self; {
   };
 
   ClassC3 = buildPerlPackage rec {
-    name = "Class-C3-0.33";
+    name = "Class-C3-0.34";
     src = fetchurl {
       url = "mirror://cpan/authors/id/H/HA/HAARG/${name}.tar.gz";
-      sha256 = "1c319k0j9knba2k0xjr8fml54kfvs71wcnc0hxp7s3lqc49mvzxf";
+      sha256 = "1dcibc31v5jwmi6hsdzi7c5ag1sb4wp3kxkibc889qrdj7jm12sd";
     };
     propagatedBuildInputs = [ AlgorithmC3 ];
     meta = {