diff --git a/pkgs/applications/networking/irc/weechat/default.nix b/pkgs/applications/networking/irc/weechat/default.nix
index 108c6848ed27..6eecadf97d32 100644
--- a/pkgs/applications/networking/irc/weechat/default.nix
+++ b/pkgs/applications/networking/irc/weechat/default.nix
@@ -36,14 +36,14 @@ let
   in
     assert lib.all (p: p.enabled -> ! (builtins.elem null p.buildInputs)) plugins;
     stdenv.mkDerivation rec {
-      version = "4.2.0";
+      version = "4.2.1";
       pname = "weechat";
 
       hardeningEnable = [ "pie" ];
 
       src = fetchurl {
         url = "https://weechat.org/files/src/weechat-${version}.tar.xz";
-        hash = "sha256-Mvam8hP7Y025MeKrjwGtuam1Dnf6ocUsoRbvoyBXWko=";
+        hash = "sha256-JT3fCG9shFAxot0pSxVShR1rBMwIovnaSu37Pi+Rvc0=";
       };
 
       # Why is this needed? https://github.com/weechat/weechat/issues/2031