diff --git a/nixos/modules/services/web-apps/invoiceplane.nix b/nixos/modules/services/web-apps/invoiceplane.nix
index 156cc238e89a..c54915b10a2d 100644
--- a/nixos/modules/services/web-apps/invoiceplane.nix
+++ b/nixos/modules/services/web-apps/invoiceplane.nix
@@ -36,10 +36,10 @@ let
     version = src.version;
     src = pkgs.invoiceplane;
 
-    patchPhase = ''
+    postPhase = ''
       # Patch index.php file to load additional config file
       substituteInPlace index.php \
-        --replace "require('vendor/autoload.php');" "require('vendor/autoload.php'); \$dotenv = new \Dotenv\Dotenv(__DIR__, 'extraConfig.php'); \$dotenv->load();";
+        --replace "require('vendor/autoload.php');" "require('vendor/autoload.php'); \$dotenv = Dotenv\Dotenv::createImmutable(__DIR__, 'extraConfig.php'); \$dotenv->load();";
     '';
 
     installPhase = ''
diff --git a/nixos/tests/invoiceplane.nix b/nixos/tests/invoiceplane.nix
index 4e63f8ac21c9..260e49db54d3 100644
--- a/nixos/tests/invoiceplane.nix
+++ b/nixos/tests/invoiceplane.nix
@@ -13,12 +13,12 @@ import ./make-test-python.nix ({ pkgs, ... }:
       services.invoiceplane.webserver = "caddy";
       services.invoiceplane.sites = {
         "site1.local" = {
-          #database.name = "invoiceplane1";
+          database.name = "invoiceplane1";
           database.createLocally = true;
           enable = true;
         };
         "site2.local" = {
-          #database.name = "invoiceplane2";
+          database.name = "invoiceplane2";
           database.createLocally = true;
           enable = true;
         };
diff --git a/pkgs/servers/web-apps/invoiceplane/default.nix b/pkgs/servers/web-apps/invoiceplane/default.nix
index fa79997fbd01..670d42102f51 100644
--- a/pkgs/servers/web-apps/invoiceplane/default.nix
+++ b/pkgs/servers/web-apps/invoiceplane/default.nix
@@ -2,51 +2,20 @@
 
 stdenv.mkDerivation rec {
   pname = "invoiceplane";
-  version = "1.5.11";
+  version = "1.6-beta-1";
 
   src = fetchurl {
     url = "https://github.com/InvoicePlane/InvoicePlane/releases/download/v${version}/v${version}.zip";
-    sha256 = "137g0xps4kb3j7f5gz84ql18iggbya6d9dnrfp05g2qcbbp8kqad";
+    sha256 = "sha256-hIbk9zzqbwv2kSFClgPfTObB1YHj7KR4swKjGoN2v2E=";
   };
 
-  patches = [
-
-    # Fix CVE-2021-29024, unauthenticated directory listing
-    # Should be included in a later release > 1.5.11
-    # https://github.com/NixOS/nixpkgs/issues/166655
-    # https://github.com/InvoicePlane/InvoicePlane/pull/754
-    (fetchpatch {
-      url = "https://patch-diff.githubusercontent.com/raw/InvoicePlane/InvoicePlane/pull/754.patch";
-      sha256 = "sha256-EHXw7Zqli/nA3tPIrhxpt8ueXvDtshz0XRzZT78sdQk=";
-    })
-
-    # Fix CVE-2021-29023, password reset rate-limiting
-    # Should be included in a later release > 1.5.11
-    # https://github.com/NixOS/nixpkgs/issues/166655
-    # https://github.com/InvoicePlane/InvoicePlane/pull/739
-    (fetchpatch {
-      url = "https://patch-diff.githubusercontent.com/raw/InvoicePlane/InvoicePlane/pull/739.patch";
-      sha256 = "sha256-6ksJjW6awr3lZsDRxa22pCcRGBVBYyV8+TbhOp6HBq0=";
-    })
-
-    # Fix CVE-2021-29022, full path disclosure
-    # Should be included in a later release > 1.5.11
-    # https://github.com/NixOS/nixpkgs/issues/166655
-    # https://github.com/InvoicePlane/InvoicePlane/pull/767
-    #(fetchpatch {
-    #  url = "https://patch-diff.githubusercontent.com/raw/InvoicePlane/InvoicePlane/pull/767.patch";
-    #  sha256 = "sha256-rSWDH8KeHSRWLyQEa7RSwv+8+ja9etTz+6Q9XThuwUo=";
-    #})
-
-  ];
-
   nativeBuildInputs = [ unzip ];
 
   sourceRoot = ".";
 
   installPhase = ''
     mkdir -p $out/
-    cp -r . $out/
+    cp -r ip/. $out/
   '';
 
   passthru.tests = {