diff --git a/pkgs/servers/mastodon/source.nix b/pkgs/servers/mastodon/source.nix
index 6c8361141111..70bba321fca5 100644
--- a/pkgs/servers/mastodon/source.nix
+++ b/pkgs/servers/mastodon/source.nix
@@ -5,14 +5,14 @@
   patches ? [ ],
 }:
 let
-  version = "4.5.5";
+  version = "4.5.6";
 in
 applyPatches {
   src = fetchFromGitHub {
     owner = "mastodon";
     repo = "mastodon";
     rev = "v${version}";
-    hash = "sha256-3tu7HYrJ+32yIgO6zVBokPTt66zICZOBzRFAeEVidWo=";
+    hash = "sha256-m2LDNyv2jxsp5zPKOfQWvtBG8bD8iuBWBEoz+L0OvNk=";
     passthru = {
       inherit version;
       yarnHash = "sha256-2MOl6kHidkGU2I/cZaUmbQCiEl9SDfL/j9fT/6eNdFA=";