diff --git a/config/hosts/mastodon/mastodon.nix b/config/hosts/mastodon/mastodon.nix
index 37f8ede..d53f26a 100644
--- a/config/hosts/mastodon/mastodon.nix
+++ b/config/hosts/mastodon/mastodon.nix
@@ -16,14 +16,14 @@ let
   };
   mastodonNekoverseOverlay = final: prev: {
     mastodon = (prev.mastodon.override rec {
-      version = "4.6.4";
+      version = "4.6.3";
       srcOverride = final.applyPatches {
         src = pkgs.stdenv.mkDerivation {
           name = "mastodonWithThemes";
           src = pkgs.fetchgit {
             url = "https://github.com/mastodon/mastodon.git";
             rev = "v${version}";
-            sha256 = "sha256-lqtAsCIC+v161BH14wbyKfIN7jVVqJ6fi2pyFfX5ONg=";
+            sha256 = "sha256-NMeI8Ev0CSIf0dfbjqVAmFuTU9MFC8Y3qO9gI3p8Y+4=";
           };
           # mastodon ships with broken symlinks, disable the check for that for now
           dontCheckForBrokenSymlinks = true;
@@ -53,7 +53,7 @@ let
       yarnMissingHashes = prev.mastodon.src.yarnMissingHashes;
     });
   };
-  pkgs-overlay = nixpkgs-master.legacyPackages."x86_64-linux".extend mastodonNekoverseOverlay;
+  pkgs-overlay = nixpkgs-unstable.legacyPackages."x86_64-linux".extend mastodonNekoverseOverlay;
   vapidPublicKey = pkgs.writeText "vapid-public-key" "BDCbFEDCZ8eFuWr3uEq4Qc30UFZUQeNpF8OCw6OjPwAtaKS1yTM3Ue749Xjqy5WhBDjakzlixh4Gk7gluUhIdsU=";
 in
 {
diff --git a/flake.lock b/flake.lock
index 792df94..5367802 100644
--- a/flake.lock
+++ b/flake.lock
@@ -118,11 +118,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1785274772,
-        "narHash": "sha256-9gQDLspX2cy1O+OO1I7SpcMbJYbDkYHWeI1MzNNa++M=",
+        "lastModified": 1784963280,
+        "narHash": "sha256-mXy7mN4wRWYAnXOyKDylTnThiFGRjSqIRUVv44o+I7A=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "37c0c0f9d5b59fbad07f0d3f7fbef70c36adf626",
+        "rev": "4d9b14754f8d4fefe57009774c4024acba495666",
         "type": "github"
       },
       "original": {
@@ -134,11 +134,11 @@
     },
     "nixpkgs-master": {
       "locked": {
-        "lastModified": 1785356796,
-        "narHash": "sha256-ljIw3TvUqNPVl6QXyGM+NZlALimRQcmds86LB87QIH4=",
+        "lastModified": 1785001027,
+        "narHash": "sha256-Cc+7WLCh3sss1d+4DDLuEma4a2v3YdXGez/N+MJoomY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "0cfaf6be452abc059d891c7083f094eb1ade5f0b",
+        "rev": "b2a8a65ad069640cf1a0656b355338a65c41ac12",
         "type": "github"
       },
       "original": {
@@ -150,11 +150,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1785307242,
-        "narHash": "sha256-ru0UgPKsj5gRJHkLVUY88sIymx4WPniZCtUJyldMtLs=",
+        "lastModified": 1784966893,
+        "narHash": "sha256-WCrs/9bdH+gzSZit3UrSa4sWdyZ8+uC5x5bymPgBHMg=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "255d738cbacb7f30ac8629e091538c4382841ac5",
+        "rev": "328e42b4f861ae88cf3643962ed5c4ff918f2ba8",
         "type": "github"
       },
       "original": {
@@ -198,11 +198,11 @@
         "nixpkgs": "nixpkgs_2"
       },
       "locked": {
-        "lastModified": 1785198005,
-        "narHash": "sha256-falBPi+PJtMx0vwII8L24wjDGXNZMwRiVXsw8WTXLEo=",
+        "lastModified": 1784546415,
+        "narHash": "sha256-uGguGzFhFbzdC46Uwiu+8V7a/VPMdt8VU04HHcVOTcQ=",
         "owner": "simple-nixos-mailserver",
         "repo": "nixos-mailserver",
-        "rev": "d357b9f048c5532ec81b0e0034c0b8463d5ddd46",
+        "rev": "9e3c3510ced1cb278e3522a6a0f6fe302cc805eb",
         "type": "gitlab"
       },
       "original": {