diff --git a/.github/workflows/allInOne.yml b/.github/workflows/allInOne.yml
index d6af0de68..2c4fa746e 100644
--- a/.github/workflows/allInOne.yml
+++ b/.github/workflows/allInOne.yml
@@ -4,6 +4,7 @@ on: [push]
 
 env:
   SWIG_VERSION: 4.0.2
+  LLVM_MINGW_VERSION: 20260616
 
 jobs:
   validate-gradle-wrapper:
@@ -15,7 +16,7 @@ jobs:
   swig:
     strategy:
       matrix:
-        os: [ubuntu-20.04, macos-12, macos-14]
+        os: [ubuntu-24.04, ubuntu-24.04-arm, macos-26-intel, macos-26]
     runs-on: ${{ matrix.os }}
     steps:
       - name: SWIG from cache
@@ -24,11 +25,13 @@ jobs:
         with:
           path: ${{ github.workspace }}/swig
           key: ${{ runner.os }}-${{ runner.arch }}-swig-${{ env.SWIG_VERSION }}
-      - name: Install SWIG build dependencies
-        if: steps.cache-swig.outputs.cache-hit != 'true'
+      - name: Install SWIG dependencies
+        # Always install, even on a cache hit: this also provides the pcre runtime
+        # library the cached swig binary is linked against, which isn't persisted
+        # across runner VMs by the actions/cache step above.
         run: |
           if [ "${{ runner.os }}" == 'Linux' ]; then
-            sudo apt-get install -y autoconf automake libtool
+            sudo apt-get install -y autoconf automake libtool libpcre3-dev
           elif [ "${{ runner.os }}" == 'macOS' ]; then
             brew install autoconf automake libtool pcre
           else
@@ -45,16 +48,12 @@ jobs:
           ./configure --prefix=$GITHUB_WORKSPACE/swig
           make
           make install
-      - name: Install SWIG runtime dependencies
-        if: runner.os == 'macOs'
-        run: |
-          brew install pcre
       - name: Check SWIG version
         run: $GITHUB_WORKSPACE/swig/bin/swig -version
   build:
     strategy:
       matrix:
-        os: [ubuntu-20.04, macos-12, macos-14]
+        os: [ubuntu-24.04, ubuntu-24.04-arm, macos-26-intel, macos-26]
     runs-on: ${{ matrix.os }}
     needs: [validate-gradle-wrapper, swig]
     steps:
@@ -69,9 +68,20 @@ jobs:
           fail-on-cache-miss: true
       - name: Add SWIG to $PATH
         run: echo "${{ github.workspace }}/swig/bin" >> $GITHUB_PATH
+      - name: Install libpcre3
+        if: runner.os == 'Linux'
+        run: sudo apt-get install -y libpcre3-dev
       - name: Install MinGW-w64
         if: runner.os == 'Linux'
         run: sudo apt-get install -y mingw-w64
+      - name: Install llvm-mingw (Windows arm64 cross-compiler)
+        # Classic mingw-w64 (GCC) has no Windows/ARM64 target; only needed on the job
+        # that actually builds linux_windows_arm64_llvm_mingw32, see build.gradle.
+        if: runner.os == 'Linux' && runner.arch == 'X64'
+        run: |
+          curl -fL -o llvm-mingw.tar.xz "https://github.com/mstorsjo/llvm-mingw/releases/download/${{ env.LLVM_MINGW_VERSION }}/llvm-mingw-${{ env.LLVM_MINGW_VERSION }}-ucrt-ubuntu-22.04-x86_64.tar.xz"
+          tar xf llvm-mingw.tar.xz
+          echo "$PWD/llvm-mingw-${{ env.LLVM_MINGW_VERSION }}-ucrt-ubuntu-22.04-x86_64/bin" >> $GITHUB_PATH
       - name: Install pcre
         if: runner.os == 'macOS'
         run: brew install pcre
@@ -80,7 +90,7 @@ jobs:
       - name: Set up JDK
         uses: actions/setup-java@v4
         with:
-          java-version: '11'
+          java-version: '17'
           distribution: 'temurin'
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@v3
@@ -95,7 +105,7 @@ jobs:
             build/natives/*/*.dll
             build/natives/*/*.dylib
   publish:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     needs: [validate-gradle-wrapper, swig, build]
     if: github.ref == 'refs/heads/master'
     steps:
@@ -110,12 +120,14 @@ jobs:
           fail-on-cache-miss: true
       - name: Add SWIG to $PATH
         run: echo "${{ github.workspace }}/swig/bin" >> $GITHUB_PATH
+      - name: Install libpcre3
+        run: sudo apt-get install -y libpcre3-dev
       - name: Check SWIG version
         run: swig -version
       - name: Set up JDK
         uses: actions/setup-java@v4
         with:
-          java-version: '11'
+          java-version: '17'
           distribution: 'temurin'
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@v3
diff --git a/build.gradle b/build.gradle
index 8f0f82772..266da5c8c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -14,15 +14,25 @@ ext {
             natives = ["macosx_amd64_clang"]
         }        
     } else if (Os.isFamily(Os.FAMILY_UNIX)) {
-        // Cross-compilation with MinGW-w64 allows us to also build the Windows target on Linux
-        natives = ["linux_amd64_gcc","linux_windows_amd64_mingw32"]
+        if (Os.isArch("aarch64")) {
+            // No MinGW-w64 cross target here: the Windows amd64 build is unrelated to and
+            // not reliably available when cross-compiling from an aarch64 host.
+            natives = ["linux_aarch64_gcc"]
+        } else {
+            // Cross-compilation with MinGW-w64 allows us to also build the Windows amd64 target
+            // on Linux, and with llvm-mingw (must be on PATH, see toolchains/linux_windows_arm64_llvm_mingw32.cmake)
+            // the Windows arm64 target too.
+            natives = ["linux_amd64_gcc","linux_windows_amd64_mingw32","linux_windows_arm64_llvm_mingw32"]
+        }
     } else {
         throw new GradleException("This script only works on Linux or Mac")
     }
 
     allNatives = [
         "linux_amd64_gcc",
+        "linux_aarch64_gcc",
         "linux_windows_amd64_mingw32",
+        "linux_windows_arm64_llvm_mingw32",
         "macosx_aarch64_clang",
         "macosx_amd64_clang"
     ]
@@ -31,8 +41,8 @@ ext {
 }
 
 java {
-    sourceCompatibility(JavaVersion.VERSION_1_8)
-    targetCompatibility(JavaVersion.VERSION_1_8)
+    sourceCompatibility(JavaVersion.VERSION_17)
+    targetCompatibility(JavaVersion.VERSION_17)
 }
 
 // We use both Maven Central and our own Artifactory instance, which contains module builds, extra libs, and so on
@@ -108,9 +118,14 @@ natives.each { module ->
             mkdir "$rootDir/build/natives/${module}"
         }
         doLast {
-            exec {
-                workingDir "$rootDir/build/natives/${module}"
-                commandLine 'make', "-j${Runtime.runtime.availableProcessors()}"
+            def process = new ProcessBuilder('make', "-j${Runtime.runtime.availableProcessors()}")
+                .directory(file("$rootDir/build/natives/${module}"))
+                .redirectErrorStream(true)
+                .start()
+            process.inputStream.eachLine { println it }
+            def exitCode = process.waitFor()
+            if (exitCode != 0) {
+                throw new GradleException("make failed with exit code ${exitCode}")
             }
         }
     }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 9f4197d5f..a351597e6 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.2.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.6.1-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/toolchains/android_armeabi_gcc.cmake b/toolchains/android_armeabi_gcc.cmake
index d75f3f566..93d961234 100644
--- a/toolchains/android_armeabi_gcc.cmake
+++ b/toolchains/android_armeabi_gcc.cmake
@@ -14,7 +14,7 @@
 
 # toolchain for linux: https://github.com/staticlibs/android-ndk-r9d-arm-linux-androideabi-4.8
 
-cmake_minimum_required ( VERSION 2.8.12 )
+cmake_minimum_required ( VERSION 3.5 )
 
 # default to Debug
 set ( CMAKE_BUILD_TYPE "Debug" CACHE STRING "Default build type" )
diff --git a/toolchains/linux_aarch64_gcc.cmake b/toolchains/linux_aarch64_gcc.cmake
new file mode 100644
index 000000000..5a62b54b3
--- /dev/null
+++ b/toolchains/linux_aarch64_gcc.cmake
@@ -0,0 +1,26 @@
+# Copyright 2015, alex at staticlibs.net
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+cmake_minimum_required ( VERSION 3.5 )
+
+# default to Debug
+set ( CMAKE_BUILD_TYPE "Debug" CACHE STRING "Default build type" )
+
+set ( CMAKE_SYSTEM_NAME Linux )
+set ( CMAKE_SYSTEM_ARCH aarch64 )
+
+set ( CMAKE_C_COMPILER gcc )
+set ( CMAKE_CXX_COMPILER g++ )
+
+set(CMAKE_CXX_FLAGS_RELEASE "-O3")
diff --git a/toolchains/linux_amd64_gcc.cmake b/toolchains/linux_amd64_gcc.cmake
index fe6a98bb1..682eaa66f 100644
--- a/toolchains/linux_amd64_gcc.cmake
+++ b/toolchains/linux_amd64_gcc.cmake
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-cmake_minimum_required ( VERSION 2.8.12 )
+cmake_minimum_required ( VERSION 3.5 )
 
 # default to Debug
 set ( CMAKE_BUILD_TYPE "Debug" CACHE STRING "Default build type" )
diff --git a/toolchains/linux_i686_gcc.cmake b/toolchains/linux_i686_gcc.cmake
index fdb40a245..1216624f5 100644
--- a/toolchains/linux_i686_gcc.cmake
+++ b/toolchains/linux_i686_gcc.cmake
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-cmake_minimum_required ( VERSION 2.8.12 )
+cmake_minimum_required ( VERSION 3.5 )
 
 set ( CMAKE_SYSTEM_NAME Linux )
 set ( CMAKE_SYSTEM_ARCH i686)
diff --git a/toolchains/linux_windows_arm64_llvm_mingw32.cmake b/toolchains/linux_windows_arm64_llvm_mingw32.cmake
new file mode 100644
index 000000000..eac205a82
--- /dev/null
+++ b/toolchains/linux_windows_arm64_llvm_mingw32.cmake
@@ -0,0 +1,13 @@
+# the name of the target operating system
+SET(CMAKE_SYSTEM_NAME Windows)
+set ( CMAKE_SYSTEM_ARCH aarch64)
+
+# Classic mingw-w64 (GCC) has no Windows/ARM64 target; this uses the LLVM-based
+# llvm-mingw toolchain instead (https://github.com/mstorsjo/llvm-mingw), which
+# must be on PATH providing these compiler names.
+set(COMPILER_PREFIX "aarch64-w64-mingw32")
+
+SET(CMAKE_C_COMPILER ${COMPILER_PREFIX}-gcc)
+SET(CMAKE_CXX_COMPILER ${COMPILER_PREFIX}-g++)
+
+set(CMAKE_CXX_FLAGS_RELEASE "-O3")
diff --git a/toolchains/macosx_aarch64_clang.cmake b/toolchains/macosx_aarch64_clang.cmake
index 29aa387ae..10762fe4f 100644
--- a/toolchains/macosx_aarch64_clang.cmake
+++ b/toolchains/macosx_aarch64_clang.cmake
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-cmake_minimum_required ( VERSION 2.8.12 )
+cmake_minimum_required ( VERSION 3.5 )
 
 # default to Debug
 set ( CMAKE_BUILD_TYPE "Debug" CACHE STRING "Default build type" )
diff --git a/toolchains/macosx_amd64_clang.cmake b/toolchains/macosx_amd64_clang.cmake
index 5ed31f1e0..24800976c 100644
--- a/toolchains/macosx_amd64_clang.cmake
+++ b/toolchains/macosx_amd64_clang.cmake
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-cmake_minimum_required ( VERSION 2.8.12 )
+cmake_minimum_required ( VERSION 3.5 )
 
 # default to Debug
 set ( CMAKE_BUILD_TYPE "Debug" CACHE STRING "Default build type" )
diff --git a/toolchains/windows_amd64_msvc.cmake b/toolchains/windows_amd64_msvc.cmake
index 76c31fa93..185fef31d 100644
--- a/toolchains/windows_amd64_msvc.cmake
+++ b/toolchains/windows_amd64_msvc.cmake
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-cmake_minimum_required ( VERSION 2.8.12 )
+cmake_minimum_required ( VERSION 3.5 )
 
 # default to Debug
 set ( CMAKE_BUILD_TYPE "Debug" CACHE STRING "Default build type" )
diff --git a/toolchains/windows_i686_msvc.cmake b/toolchains/windows_i686_msvc.cmake
index 20fd554b4..2e870ec47 100644
--- a/toolchains/windows_i686_msvc.cmake
+++ b/toolchains/windows_i686_msvc.cmake
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-cmake_minimum_required ( VERSION 2.8.12 )
+cmake_minimum_required ( VERSION 3.5 )
 
 # default to Debug
 set ( CMAKE_BUILD_TYPE "Debug" CACHE STRING "Default build type" )