diff --git a/pkgs/servers/mastodon/source.nix b/pkgs/servers/mastodon/source.nix
index 313ecf64620d..0b2fd5b57e09 100644
--- a/pkgs/servers/mastodon/source.nix
+++ b/pkgs/servers/mastodon/source.nix
@@ -1,7 +1,7 @@
 # This file was generated by pkgs.mastodon.updateScript.
 { fetchFromGitHub, applyPatches, patches ? [] }:
 let
-  version = "4.2.11";
+  version = "4.2.12";
 in
 (
   applyPatches {
@@ -9,7 +9,7 @@ in
       owner = "mastodon";
       repo = "mastodon";
       rev = "v${version}";
-      hash = "sha256-pOO3Ice8BMt+YyN5VNv2ayb5l2tY3wgbhHDcWy7Lqe0=";
+      hash = "sha256-q+j7zHJrIUOumJfk4w5BVu7eTUa1AjI5ho8XoOA2uJU=";
     };
     patches = patches ++ [];
   }) // {