diff --git a/build.gradle.kts b/build.gradle.kts
index 44eaa29..7ff2552 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -5,17 +5,17 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath("com.h2database:h2:1.4.200")
+        classpath(libs.jdbc.h2)
     }
 }
 
 plugins {
     id("application")
-    id("com.diffplug.spotless") version "7.0.3"
-    id("org.domaframework.doma.codegen") version "3.0.0"
-    id("org.domaframework.doma.compile") version "3.0.1"
-    kotlin("jvm") version "2.1.20"
-    kotlin("kapt") version "2.1.20"
+    alias(libs.plugins.spotless)
+    alias(libs.plugins.doma.codegen)
+    alias(libs.plugins.doma.compile)
+    alias(libs.plugins.kotlin.jvm)
+    alias(libs.plugins.kotlin.kapt)
 }
 
 kotlin {
@@ -28,17 +28,16 @@ application {
 }
 
 dependencies {
-    val domaVersion: String by project
-    kapt("org.seasar.doma:doma-processor:$domaVersion")
-    implementation("org.seasar.doma:doma-kotlin:$domaVersion")
-    implementation("org.seasar.doma:doma-slf4j:$domaVersion")
-    runtimeOnly("ch.qos.logback:logback-classic:1.5.18")
-    runtimeOnly("com.h2database:h2:1.4.200")
+    kapt(libs.doma.processor)
+    implementation(libs.doma.kotlin)
+    implementation(libs.doma.slf4j)
+    runtimeOnly(libs.logback.classic)
+    runtimeOnly(libs.jdbc.h2)
     // Use JUnit BOM for version management
-    testImplementation(platform("org.junit:junit-bom:5.12.2"))
-    testImplementation("org.junit.jupiter:junit-jupiter-api")
-    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine")
-    testRuntimeOnly("org.junit.platform:junit-platform-launcher")
+    testImplementation(platform(libs.junit.bom))
+    testImplementation(libs.junit.jupiter.api)
+    testRuntimeOnly(libs.junit.jupiter.engine)
+    testRuntimeOnly(libs.junit.platform.launcher)
 }
 
 repositories {
@@ -49,7 +48,7 @@ repositories {
 
 spotless {
     kotlin {
-        ktlint("1.1.1")
+        ktlint(libs.versions.ktlint.get())
         trimTrailingWhitespace()
         endWithNewline()
     }
diff --git a/gradle.properties b/gradle.properties
index 5664759..78012b1 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,4 +1,3 @@
-domaVersion=3.7.0
 kapt.incremental.apt=true
 kapt.use.worker.api=true
 kapt.include.compile.classpath=false
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
new file mode 100644
index 0000000..d892825
--- /dev/null
+++ b/gradle/libs.versions.toml
@@ -0,0 +1,30 @@
+[versions]
+doma = "3.7.0"
+kotlin = "2.1.20"
+junit = "5.12.2"
+spotless = "7.0.3"
+doma-codegen = "3.0.0"
+doma-compile = "3.0.1"
+h2 = "1.4.200"
+logback = "1.5.18"
+ktlint = "1.1.1"
+
+[libraries]
+doma-processor = { module = "org.seasar.doma:doma-processor", version.ref = "doma" }
+doma-kotlin = { module = "org.seasar.doma:doma-kotlin", version.ref = "doma" }
+doma-slf4j = { module = "org.seasar.doma:doma-slf4j", version.ref = "doma" }
+
+logback-classic = { module = "ch.qos.logback:logback-classic", version.ref = "logback" }
+jdbc-h2 = { module = "com.h2database:h2", version.ref = "h2" }
+
+junit-bom = { module = "org.junit:junit-bom", version.ref = "junit" }
+junit-jupiter-api = { module = "org.junit.jupiter:junit-jupiter-api" }
+junit-jupiter-engine = { module = "org.junit.jupiter:junit-jupiter-engine" }
+junit-platform-launcher = { module = "org.junit.platform:junit-platform-launcher" }
+
+[plugins]
+kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
+kotlin-kapt = { id = "org.jetbrains.kotlin.kapt", version.ref = "kotlin" }
+spotless = { id = "com.diffplug.spotless", version.ref = "spotless" }
+doma-codegen = { id = "org.domaframework.doma.codegen", version.ref = "doma-codegen" }
+doma-compile = { id = "org.domaframework.doma.compile", version.ref = "doma-compile" }