diff --git a/nixos/pkgs/zkapissuer/repo.nix b/nixos/pkgs/zkapissuer/repo.nix
index 6646a2e32eb8e5a747e4491ce43f706fee65724c..2062318314fd2eb6bf9337b8ed28b33004ef4dae 100644
--- a/nixos/pkgs/zkapissuer/repo.nix
+++ b/nixos/pkgs/zkapissuer/repo.nix
@@ -2,6 +2,6 @@
 fetchFromGitHub {
   owner = "PrivateStorageio";
   repo = "PaymentServer";
-  rev = "ff30e85c231a3b5ad76426bbf8801f8f76884367";
-  sha256 = "1spz19f5z96shmfpazj0rv6877xvchf3gl49a4xahjbbsz39x34x";
+  rev = "6a28c4465756f97b0cb7c54d565c356de9ded568";
+  hash = "sha256-lYAggpYL34hDLJKmCslpbdA208Z4V836Dlgj9wtP2Dg=";
 }
diff --git a/nixpkgs-2105.json b/nixpkgs-2105.json
index 8180b5739034839b1fc5142fb4c80e07577d5001..f711c5da1ef01cca29a49d49f23f05479f96912a 100644
--- a/nixpkgs-2105.json
+++ b/nixpkgs-2105.json
@@ -1,5 +1,5 @@
 {
   "name": "release2105",
-  "url": "https://releases.nixos.org/nixos/21.05/nixos-21.05.3367.fd8a7fd07da/nixexprs.tar.xz",
-  "sha256": "12p7v805xj5as2fbdh30i0b9iwy8y24sk256rgqfqylxj1784mn8"
+  "url": "https://releases.nixos.org/nixos/21.05/nixos-21.05.3443.ee90403e147/nixexprs.tar.xz",
+  "sha256": "1h29zmrp9wz88sil9vg8x6lfy5n1hxrcpjk9am2bnvz9ps5ggn3v"
 }