diff --git a/nixos/tests/jool.nix b/nixos/tests/jool.nix
index 06e8547a1ce8..dc7c20252dfb 100644
--- a/nixos/tests/jool.nix
+++ b/nixos/tests/jool.nix
@@ -71,6 +71,7 @@ in
         ];
       };
 
+      boot.kernelPackages = pkgs.linuxPackages_latest;
       networking.jool.enable = true;
       networking.jool.siit.default.global.pool6 = "fd::/96";
     };
@@ -191,6 +192,7 @@ in
         ];
       };
 
+      boot.kernelPackages = pkgs.linuxPackages_latest;
       networking.jool.enable = true;
       networking.jool.nat64.default = {
         bib = [
@@ -206,17 +208,17 @@ in
           {
             protocol = "TCP";
             prefix = "203.0.113.1/32";
-            "port range" = "40001-65535";
+            "port range" = "20000-29999";
           }
           {
             protocol = "UDP";
             prefix = "203.0.113.1/32";
-            "port range" = "40001-65535";
+            "port range" = "20000-29999";
           }
           {
             protocol = "ICMP";
             prefix = "203.0.113.1/32";
-            "port range" = "40001-65535";
+            "port range" = "20000-29999";
           }
           # Ports for static BIB entries
           {
diff --git a/pkgs/os-specific/linux/jool/default.nix b/pkgs/os-specific/linux/jool/default.nix
index bd705872a474..ce51323cffe4 100644
--- a/pkgs/os-specific/linux/jool/default.nix
+++ b/pkgs/os-specific/linux/jool/default.nix
@@ -19,10 +19,11 @@ stdenv.mkDerivation (finalAttrs: {
 
   src = sourceAttrs.src;
 
-  patches = lib.optionals (lib.versionAtLeast kernel.version "6.18.0") [
+  patches = lib.optionals (lib.versionAtLeast kernel.version "7.2") [
+    # https://github.com/NICMx/Jool/pull/456
     (fetchpatch {
-      url = "https://gitlab.alpinelinux.org/alpine/aports/-/raw/3.23-stable/community/jool-modules-lts/kernel-6.18.patch";
-      hash = "sha256-EtV95YaOzPU3e/8NQvUtAH/RWiV16djeKrnvSgYybCQ=";
+      url = "https://github.com/NICMx/Jool/commit/47a8c7426f08e50505e69eef7ff607a04fbab52e.diff";
+      hash = "sha256-EcfBwFKOSFQOBWl8s5Pa2/RJg9lH1ziGzvV4ap2505M=";
     })
   ];
 
diff --git a/pkgs/os-specific/linux/jool/source.nix b/pkgs/os-specific/linux/jool/source.nix
index abd866dc060e..1f11b0e5a1c3 100644
--- a/pkgs/os-specific/linux/jool/source.nix
+++ b/pkgs/os-specific/linux/jool/source.nix
@@ -1,11 +1,11 @@
 { fetchFromGitHub }:
 
 rec {
-  version = "4.1.14";
+  version = "4.1.15";
   src = fetchFromGitHub {
     owner = "NICMx";
     repo = "Jool";
     tag = "v${version}";
-    hash = "sha256-fAs289FFdUnddkikm4ceA9d/w1qqqaWuPXmAiq3cIA8=";
+    hash = "sha256-I+cgxOONq8LZWlpVaqXW+MmEKts/dQAr7Hs8uC6N8/w=";
   };
 }