diff --git a/pkgs/servers/mail/mailman/hyperkitty.nix b/pkgs/servers/mail/mailman/hyperkitty.nix
index 054d9dcf91a0..ed90362a9a2b 100644
--- a/pkgs/servers/mail/mailman/hyperkitty.nix
+++ b/pkgs/servers/mail/mailman/hyperkitty.nix
@@ -9,12 +9,12 @@ buildPythonPackage rec {
   pname = "HyperKitty";
   # Note: Mailman core must be on the latest version before upgrading HyperKitty.
   # See: https://gitlab.com/mailman/postorius/-/issues/516#note_544571309
-  version = "1.3.3";
+  version = "1.3.4";
   disabled = !isPy3k;
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0p85r9q6mn5as5b39xp9hkkipnk0156acx540n2ygk3qb3jd4a5n";
+    sha256 = "1lbh8n66fp3l5s0xvmvsbfvgs3z4knx0gwf0q117n2nfkslf13zp";
   };
 
   nativeBuildInputs = [ isort ];