diff --git a/pkgs/by-name/is/isabelle/components/isabelle-linter.nix b/pkgs/by-name/is/isabelle/components/isabelle-linter.nix
index 61a484a7f54b..6063638edd6e 100644
--- a/pkgs/by-name/is/isabelle/components/isabelle-linter.nix
+++ b/pkgs/by-name/is/isabelle/components/isabelle-linter.nix
@@ -7,13 +7,13 @@
 
 stdenv.mkDerivation rec {
   pname = "isabelle-linter";
-  version = "2024-1.0.1";
+  version = "2025-1.0.0";
 
   src = fetchFromGitHub {
     owner = "isabelle-prover";
     repo = "isabelle-linter";
-    rev = "Isabelle2024-v1.0.1";
-    hash = "sha256-oTrwcfJgbkpkIweDIyc6lZjAvdS9J4agPoJgZzH+PuQ=";
+    rev = "Isabelle2025-v1.0.0";
+    hash = "sha256-cH9EoIbKa6cqLjw83gnYvCy+Dq0d5fFmJCabdPrRJeI=";
   };
 
   nativeBuildInputs = [ isabelle ];
diff --git a/pkgs/by-name/is/isabelle/package.nix b/pkgs/by-name/is/isabelle/package.nix
index c8f5d1306e5b..363bf860b8c9 100644
--- a/pkgs/by-name/is/isabelle/package.nix
+++ b/pkgs/by-name/is/isabelle/package.nix
@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchurl,
+  fetchFromGitHub,
   coreutils,
   nettools,
   java,
@@ -10,7 +11,6 @@
   veriT,
   vampire,
   eprover-ho,
-  naproche,
   rlwrap,
   perl,
   procps,
@@ -21,6 +21,15 @@
 }:
 
 let
+  vampire' = vampire.overrideAttrs (_: {
+    src = fetchFromGitHub {
+      owner = "vprover";
+      repo = "vampire";
+      tag = "v4.8HO4Sledgahammer";
+      hash = "sha256-CmppaGa4M9tkE1b25cY1LSPFygJy5yV4kpHKbPqvcVE=";
+    };
+  });
+
   sha1 = stdenv.mkDerivation {
     pname = "isabelle-sha1";
     version = "2024";
@@ -46,7 +55,7 @@ let
 in
 stdenv.mkDerivation (finalAttrs: rec {
   pname = "isabelle";
-  version = "2024";
+  version = "2025";
 
   dirname = "Isabelle${version}";
 
@@ -54,17 +63,17 @@ stdenv.mkDerivation (finalAttrs: rec {
     if stdenv.hostPlatform.isDarwin then
       fetchurl {
         url = "https://isabelle.in.tum.de/website-${dirname}/dist/${dirname}_macos.tar.gz";
-        hash = "sha256-IgNfmW9x6h8DBj9vFEGV62oEl01NkW7QdyzXlWmii8c=";
+        hash = "sha256-6ldUwiiFf12dOuJU7JgUeX8kU+opDfILL23LLvDi5/g=";
       }
     else if stdenv.hostPlatform.isx86 then
       fetchurl {
         url = "https://isabelle.in.tum.de/website-${dirname}/dist/${dirname}_linux.tar.gz";
-        hash = "sha256-YDqq+KvqNll687BlHSwWKobAoN1EIHZvR+VyQDljkmc=";
+        hash = "sha256-PR1m3jcYI/4xqormZjj3NXW6wkTwCzGu4dy2LzgUfFY=";
       }
     else
       fetchurl {
         url = "https://isabelle.in.tum.de/website-${dirname}/dist/${dirname}_linux_arm.tar.gz";
-        hash = "sha256-jXWVv18WwrVnqVX1s4Lnyf7DkOzPa3EdLXYxgtKD+YA=";
+        hash = "sha256-p/Hp+7J5gJy5s6BVD5Ma1Mu2OS53I8BS7gKSOYYB0PE=";
       };
 
   nativeBuildInputs = [ java ];
@@ -72,7 +81,7 @@ stdenv.mkDerivation (finalAttrs: rec {
   buildInputs = [
     polyml
     veriT
-    vampire
+    vampire'
     eprover-ho
     nettools
   ];
@@ -103,8 +112,8 @@ stdenv.mkDerivation (finalAttrs: rec {
       EOF
 
       cat >contrib/vampire-*/etc/settings <<EOF
-        VAMPIRE_HOME=${vampire}/bin
-        VAMPIRE_VERSION=${vampire.version}
+        VAMPIRE_HOME=${vampire'}/bin
+        VAMPIRE_VERSION=${vampire'.version}
         VAMPIRE_EXTRA_OPTIONS="--mode casc"
       EOF
 
@@ -123,13 +132,6 @@ stdenv.mkDerivation (finalAttrs: rec {
         ISABELLE_JDK_HOME=${java}
       EOF
 
-    ''
-    + lib.optionalString stdenv.hostPlatform.isx86 ''
-      rm contrib/naproche-*/x86*/Naproche-SAD
-      ln -s ${naproche}/bin/Naproche-SAD contrib/naproche-*/x86*/
-    ''
-    + ''
-
       echo ISABELLE_LINE_EDITOR=${rlwrap}/bin/rlwrap >>etc/settings
 
       for comp in contrib/jdk* contrib/polyml-* contrib/verit-* contrib/vampire-* contrib/e-*; do
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index d59e0d200652..02be3996fe5b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -18175,19 +18175,13 @@ with pkgs;
   isabelle = callPackage ../by-name/is/isabelle/package.nix {
     polyml = polyml.overrideAttrs {
       pname = "polyml-for-isabelle";
-      version = "2024";
+      version = "2025";
       configureFlags = [
         "--enable-intinf-as-int"
         "--with-gmp"
         "--disable-shared"
       ];
       buildFlags = [ "compiler" ];
-      src = fetchFromGitHub {
-        owner = "polyml";
-        repo = "polyml";
-        rev = "v5.9.1";
-        hash = "sha256-72wm8dt+Id59A5058mVE5P9TkXW5/LZRthZoxUustVA=";
-      };
     };
 
     java = openjdk21;