diff --git a/flake.lock b/flake.lock
index aa4bc5e..c2e396f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -129,22 +129,6 @@
         "type": "github"
       }
     },
-    "nixpkgs-23-05": {
-      "locked": {
-        "lastModified": 1704290814,
-        "narHash": "sha256-LWvKHp7kGxk/GEtlrGYV68qIvPHkU9iToomNFGagixU=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "70bdadeb94ffc8806c0570eb5c2695ad29f0e421",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-23.05",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "nixpkgs-lib": {
       "locked": {
         "dir": "lib",
@@ -197,7 +181,6 @@
         "flake-utils": "flake-utils",
         "napalm": "napalm",
         "nixpkgs": "nixpkgs",
-        "nixpkgs-23-05": "nixpkgs-23-05",
         "poetry2nix": "poetry2nix"
       }
     },
diff --git a/flake.nix b/flake.nix
index 1c4f2fa..f12e8ff 100644
--- a/flake.nix
+++ b/flake.nix
@@ -12,9 +12,6 @@
     # nixos-unstable required for go 1.22, until 24.05 release
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
 
-    # will be dropped with the next update of the terraform provider
-    nixpkgs-23-05.url = "github:NixOS/nixpkgs/nixos-23.05";
-
     poetry2nix = {
       url = "github:nix-community/poetry2nix";
       inputs = {
@@ -38,7 +35,6 @@
   outputs = inputs@{
     self,
     nixpkgs,
-    nixpkgs-23-05,
     flake-parts,
     poetry2nix,
     napalm,
@@ -98,17 +94,17 @@
             manage;
 
           # terraform provider
-          terraform-provider-authentik = inputs.nixpkgs-23-05.legacyPackages.${system}.buildGo118Module rec {
+          terraform-provider-authentik = inputs.nixpkgs.legacyPackages.${system}.buildGo121Module rec {
             pname = "terraform-provider-authentik";
-            version = "2023.10.0";
+            version = "2024.4.0";
             src = pkgs.fetchFromGitHub {
               owner = "goauthentik";
               repo = pname;
               rev = "v${version}";
-              sha256 = "sha256-eyWpssvYe3KKr2vfMRBfE4W1xrZZFeP55VmAQoitamc=";
+              sha256 = "sha256-Uyh/XkAjukJwVBu43H9Eq8ve4eF3nfYsK0jC6KdfZ3U=";
             };
             doCheck = false; # tests are run against authentik -> vm test
-            vendorSha256 = "sha256-aDExL3uFLhCqFibrepb2zVOJ7aW5CWjuqtx73w7p1qc=";
+            vendorHash = "sha256-HXrct5K7BjAdExVZM4o408YIqLQs3PeK0zwVAE93/PA=";
             postInstall = ''
               path="$out/libexec/terraform-providers/registry.terraform.io/goauthentik/authentik/${version}/''${GOOS}_''${GOARCH}/"
               mkdir -p "$path"