diff --git a/build.gradle.kts b/build.gradle.kts
index 5ee2b7cd..56dc1de8 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -14,7 +14,7 @@ plugins {
 val dependencyVersions = listOf(
   "org.apache.commons:commons-lang3:3.17.0",
   "org.jetbrains:annotations:26.0.1",
-  "junit:junit:4.13.2"
+  libs.junit4,
 )
 
 val dependencyGroupVersions = mapOf<String, String>(
diff --git a/engine/build.gradle.kts b/engine/build.gradle.kts
index 7c88c03f..d4d38719 100644
--- a/engine/build.gradle.kts
+++ b/engine/build.gradle.kts
@@ -18,63 +18,56 @@ dependencies {
   constraints {
     implementation("org.slf4j:slf4j-api") {
       version {
-        strictly("[1.7,3)")
-        prefer("2.0.16")
+        strictly(libs.versions.slf4jVersionrange.get())
+        prefer(libs.versions.slf4j.get())
       }
     }
     implementation("com.squareup.moshi:moshi") {
       version {
-        strictly("[1.12.0,2)")
-        prefer("1.15.2")
+        strictly(libs.versions.moshiVersionrange.get())
+        prefer(libs.versions.moshi.get())
       }
     }
     listOf(
-      "com.squareup.okhttp3:mockwebserver",
       "com.squareup.okhttp3:okhttp"
     ).forEach {
       implementation(it) {
         version {
-          strictly("[4,5)")
-          prefer("4.12.0")
+          strictly(libs.versions.okhttpVersionrange.get())
+          prefer(libs.versions.okhttp.get())
         }
       }
     }
     listOf(
-      "com.squareup.okio:okio",
-      "com.squareup.okio:okio-jvm"
+      libs.bundles.okio
     ).forEach {
       implementation(it) {
         version {
-          strictly("[3,4)")
-          prefer("3.9.1")
+          strictly(libs.versions.okioVersionrange.get())
+          prefer(libs.versions.okio.get())
         }
       }
     }
     listOf(
-      "org.jetbrains.kotlin:kotlin-reflect",
-      "org.jetbrains.kotlin:kotlin-stdlib",
-      "org.jetbrains.kotlin:kotlin-stdlib-jdk7",
-      "org.jetbrains.kotlin:kotlin-stdlib-jdk8",
-      "org.jetbrains.kotlin:kotlin-stdlib-common",
-      "org.jetbrains.kotlin:kotlin-test"
+      libs.bundles.kotlin
     ).forEach {
       implementation(it) {
         version {
-          strictly("[1.6,3)")
-          prefer("2.1.0")
+          strictly(libs.versions.kotlinVersionrange.get())
+          prefer(libs.versions.kotlin.get())
         }
       }
     }
   }
 
-  implementation("com.squareup.moshi:moshi:1.15.2")
+  implementation(libs.moshi)
 
-  implementation("org.slf4j:slf4j-api:2.0.16")
-  testImplementation("ch.qos.logback:logback-classic:[1.2,2)!!1.3.14")
+  implementation(libs.slf4j)
+  testImplementation("ch.qos.logback:logback-classic:${libs.versions.logbackVersionrange.get()}!!${libs.versions.logback.get()}")
 
-  implementation("com.squareup.okio:okio:3.9.1")
-  implementation("com.squareup.okhttp3:okhttp:4.12.0")
-  testImplementation("com.squareup.okhttp3:mockwebserver:4.12.0")
+  implementation(libs.okio)
+  implementation(libs.okhttp)
+  testImplementation(libs.okhttpMockwebserver)
 
   implementation("org.apache.commons:commons-compress:1.27.1")
   testImplementation("org.apache.commons:commons-lang3:3.17.0")
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
new file mode 100644
index 00000000..8d7ff01c
--- /dev/null
+++ b/gradle/libs.versions.toml
@@ -0,0 +1,39 @@
+[versions]
+junixsocket = "2.10.1"
+junixsocketVersionrange = "[2.4,3)"
+kotlin = "2.1.0"
+kotlinVersionrange = "[1.6,3)"
+logback = "1.3.15"
+logbackVersionrange = "[1.2,2)"
+moshi = "1.15.2"
+moshiVersionrange = "[1.12.0,2)"
+okhttp = "4.12.0"
+okhttpVersionrange = "[4,5)"
+okio = "3.10.2"
+okioVersionrange = "[3,4)"
+slf4j = "2.0.16"
+slf4jVersionrange = "[1.7,3)"
+
+[libraries]
+junit4 = { module = "junit:junit", version = "4.13.2" }
+junixsocketCore = { module = "com.kohlschutter.junixsocket:junixsocket-core", version.ref = "junixsocket" }
+junixsocketCommon = { module = "com.kohlschutter.junixsocket:junixsocket-common", version.ref = "junixsocket" }
+kotlin = { module = "org.jetbrains.kotlin:kotlin-stdlib", version.ref = "kotlin" }
+kotlinCommon = { module = "org.jetbrains.kotlin:kotlin-stdlib-common", version.ref = "kotlin" }
+kotlinJdk7 = { module = "org.jetbrains.kotlin:kotlin-stdlib-jdk7", version.ref = "kotlin" }
+kotlinJdk8 = { module = "org.jetbrains.kotlin:kotlin-stdlib-jdk8", version.ref = "kotlin" }
+kotlinReflect = { module = "org.jetbrains.kotlin:kotlin-reflect", version.ref = "kotlin" }
+kotlinTest = { module = "org.jetbrains.kotlin:kotlin-test", version.ref = "kotlin" }
+logback = { module = "ch.qos.logback:logback-classic", version.ref = "logback" }
+moshi = { module = "com.squareup.moshi:moshi", version.ref = "moshi" }
+okhttp = { module = "com.squareup.okhttp3:okhttp", version.ref = "okhttp" }
+okhttpMockwebserver = { module = "com.squareup.okhttp3:mockwebserver", version.ref = "okhttp" }
+okio = { module = "com.squareup.okio:okio", version.ref = "okio" }
+okioJvm = { module = "com.squareup.okio:okio-jvm", version.ref = "okio" }
+slf4j = { module = "org.slf4j:slf4j-api", version.ref = "slf4j" }
+
+[bundles]
+junixsocket = ["junixsocketCore", "junixsocketCommon"]
+kotlin = ["kotlin", "kotlinCommon", "kotlinJdk7", "kotlinJdk8", "kotlinReflect", "kotlinTest"]
+okhttp = ["okhttp", "okhttpMockwebserver"]
+okio = ["okio", "okioJvm"]
diff --git a/integrationtest/build.gradle.kts b/integrationtest/build.gradle.kts
index 691ebc08..20575dd9 100644
--- a/integrationtest/build.gradle.kts
+++ b/integrationtest/build.gradle.kts
@@ -18,49 +18,41 @@ dependencies {
   constraints {
     implementation("org.slf4j:slf4j-api") {
       version {
-        strictly("[1.7,3)")
-        prefer("2.0.16")
+        strictly(libs.versions.slf4jVersionrange.get())
+        prefer(libs.versions.slf4j.get())
       }
     }
     listOf(
-      "com.squareup.okhttp3:mockwebserver",
-      "com.squareup.okhttp3:okhttp"
+      libs.bundles.okhttp
     ).forEach {
       implementation(it) {
         version {
-          strictly("[4,5)")
-          prefer("4.12.0")
+          strictly(libs.versions.okhttpVersionrange.get())
+          prefer(libs.versions.okhttp.get())
         }
       }
     }
     implementation("com.squareup.okio:okio") {
       version {
-        strictly("[3,4)")
-        prefer("3.9.1")
+        strictly(libs.versions.okioVersionrange.get())
+        prefer(libs.versions.okio.get())
       }
     }
     listOf(
-      "org.jetbrains.kotlin:kotlin-reflect",
-      "org.jetbrains.kotlin:kotlin-stdlib",
-      "org.jetbrains.kotlin:kotlin-stdlib-jdk7",
-      "org.jetbrains.kotlin:kotlin-stdlib-jdk8",
-      "org.jetbrains.kotlin:kotlin-stdlib-common",
-      "org.jetbrains.kotlin:kotlin-test"
+      libs.bundles.kotlin
     ).forEach {
       implementation(it) {
         version {
-          strictly("[1.6,3)")
-          prefer("2.1.0")
+          strictly(libs.versions.kotlinVersionrange.get())
+          prefer(libs.versions.kotlin.get())
         }
       }
     }
   }
   implementation(project(":engine"))
-  testImplementation("com.squareup.okhttp3:okhttp:4.12.0")
-
-  testImplementation("org.slf4j:slf4j-api:2.0.16")
-  testRuntimeOnly("ch.qos.logback:logback-classic:[1.2,2)!!1.3.14")
-
+  testImplementation(libs.okhttp)
+  testImplementation(libs.slf4j)
+  testRuntimeOnly(libs.logback)
   testImplementation("org.spockframework:spock-core:2.3-groovy-4.0")
   testRuntimeOnly("net.bytebuddy:byte-buddy:1.15.11")
 }