diff --git a/.github/workflows/build-and-run-tests.yml b/.github/workflows/build-and-run-tests.yml
index 9df103bba..def962558 100644
--- a/.github/workflows/build-and-run-tests.yml
+++ b/.github/workflows/build-and-run-tests.yml
@@ -15,7 +15,7 @@ jobs:
     name: Run tests
     strategy:
       matrix:
-        os: [ ubuntu-22.04, windows-latest, macos-latest ]
+        os: [ ubuntu-24.04, windows-latest, macos-latest ]
 
     runs-on: ${{ matrix.os }}
 
diff --git a/ksmt-z3/ksmt-z3-native/build.gradle.kts b/ksmt-z3/ksmt-z3-native/build.gradle.kts
index 89306c80d..a5ce9e4d1 100644
--- a/ksmt-z3/ksmt-z3-native/build.gradle.kts
+++ b/ksmt-z3/ksmt-z3-native/build.gradle.kts
@@ -4,15 +4,11 @@ plugins {
     id("io.ksmt.ksmt-base")
 }
 
-val distDir = projectDir.parentFile.resolve("dist")
-
 repositories {
     mavenCentral()
-    flatDir { dirs(distDir) }
 }
 
 val compileConfig by configurations.creating
-val z3NativeLinuxX64 by configurations.creating
 
 val `windows-x64` by sourceSets.creating
 val `linux-x64` by sourceSets.creating
@@ -21,18 +17,18 @@ val `mac-arm` by sourceSets.creating
 val `windows-arm` by sourceSets.creating
 val `linux-arm` by sourceSets.creating
 
-val z3Version = "4.15.3"
+val z3Version = "4.15.8"
 
 val winDllPath = listOf("**/vcruntime140.dll", "**/vcruntime140_1.dll", "**/libz3.dll", "**/libz3java.dll")
 val linuxSoPath = listOf("**/libz3.so", "**/libz3java.so")
 val macDylibPath = listOf("**/libz3.dylib", "**/libz3java.dylib")
 
 val z3Binaries = listOf(
-    Triple(`windows-x64`, mkZ3ReleaseDownloadTask(z3Version, "x64-win", winDllPath), null),
-    Triple(`linux-x64`, null, z3NativeLinuxX64),
-    Triple(`mac-x64`, mkZ3ReleaseDownloadTask(z3Version, "x64-osx-13.7.6", macDylibPath), null),
-    Triple(`mac-arm`, mkZ3ReleaseDownloadTask(z3Version, "arm64-osx-13.7.6", macDylibPath), null),
-    Triple(`linux-arm`, mkZ3ReleaseDownloadTask(z3Version, "arm64-glibc-2.34", linuxSoPath), null),
+    Pair(`windows-x64`, mkZ3ReleaseDownloadTask(z3Version, "x64-win", winDllPath)),
+    Pair(`linux-x64`, mkZ3ReleaseDownloadTask(z3Version, "x64-glibc-2.39", linuxSoPath)),
+    Pair(`mac-x64`, mkZ3ReleaseDownloadTask(z3Version, "x64-osx-15.7.3", macDylibPath)),
+    Pair(`mac-arm`, mkZ3ReleaseDownloadTask(z3Version, "arm64-osx-15.7.3", macDylibPath)),
+    Pair(`linux-arm`, mkZ3ReleaseDownloadTask(z3Version, "arm64-glibc-2.38", linuxSoPath)),
 )
 
 z3Binaries.forEach { it.first.compileClasspath = compileConfig }
@@ -40,11 +36,9 @@ z3Binaries.forEach { it.first.compileClasspath = compileConfig }
 dependencies {
     compileConfig(project(":ksmt-core"))
     compileConfig(project(":ksmt-z3:ksmt-z3-core"))
-
-    z3NativeLinuxX64("z3", "z3-native-linux-x86-64", z3Version, ext = "zip")
 }
 
-z3Binaries.forEach { (sourceSet, z3BinaryTask, nativeConfig) ->
+z3Binaries.forEach { (sourceSet, z3BinaryTask) ->
     val name = sourceSet.name
     val artifactName = "ksmt-z3-native-$name"
     val systemArch = name.replace('-', '/')
@@ -57,14 +51,10 @@ z3Binaries.forEach { (sourceSet, z3BinaryTask, nativeConfig) ->
         archiveBaseName.set(artifactName)
         from(sourceSet.output)
 
-        z3BinaryTask?.let {
+        z3BinaryTask.let {
             dependsOn(it)
             from(it.outputFiles) { into("lib/$systemArch/z3") }
         }
-
-        nativeConfig?.let {
-            copyArtifactsIntoJar(it, this, "lib/$systemArch/z3")
-        }
     }
 
     publishing.publications {
@@ -81,17 +71,14 @@ z3Binaries.forEach { (sourceSet, z3BinaryTask, nativeConfig) ->
 }
 
 tasks.getByName<Jar>("jar") {
-    z3Binaries.forEach { (sourceSet, z3BinaryTask, nativeConfig) ->
+    z3Binaries.forEach { (sourceSet, z3BinaryTask) ->
         from(sourceSet.output)
 
         val systemArch = sourceSet.name.replace('-', '/')
-        z3BinaryTask?.let {
+        z3BinaryTask.let {
             dependsOn(it)
             from(it.outputFiles) { into("lib/$systemArch/z3") }
         }
-        nativeConfig?.let {
-            copyArtifactsIntoJar(it, this, "lib/$systemArch/z3")
-        }
     }
 }