diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 0b9fb54..6d6fe70 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -21,13 +21,13 @@ try {
 }
 
 android {
-    compileSdk = 29
+    compileSdk = libs.versions.maxSdk.get().toInt()
     defaultConfig {
         applicationId = "com.wbrawner.pihelper"
-        minSdk = 23
-        targetSdk = 29
-        versionCode = 2
-        versionName = "1.0.0"
+        minSdk = libs.versions.minSdk.get().toInt()
+        targetSdk = libs.versions.maxSdk.get().toInt()
+        versionCode = libs.versions.versionCode.get().toInt()
+        versionName = libs.versions.versionName.get()
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         signingConfig = signingConfigs["debug"]
     }
@@ -63,24 +63,19 @@ android {
 
 dependencies {
     implementation(project(":piholeclient"))
-    implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk7:${rootProject.ext["kotlinVersion"]}")
-    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:${rootProject.ext["coroutinesVersion"]}")
-    implementation("org.koin:koin-androidx-viewmodel:${rootProject.ext["koinVersion"]}")
-    implementation("androidx.appcompat:appcompat:1.2.0")
-    implementation("androidx.core:core-ktx:1.3.2")
+    implementation(libs.bundles.coroutines)
+    implementation("io.insert-koin:koin-androidx-viewmodel:${libs.versions.koin.get()}")
+    implementation(libs.androidx.core)
+    implementation(libs.androidx.appcompat)
+    implementation(libs.material)
     implementation("androidx.constraintlayout:constraintlayout:2.0.4")
-    implementation("com.google.android.material:material:1.3.0-alpha04")
     implementation("androidx.legacy:legacy-support-v4:1.0.0")
     implementation("androidx.security:security-crypto:1.0.0-rc01")
-    implementation("androidx.preference:preference-ktx:1.1.1")
-    testImplementation("junit:junit:4.13.1")
-    androidTestImplementation("androidx.test.ext:junit:1.1.2")
-    androidTestImplementation("androidx.test.espresso:espresso-core:3.3.0")
-    val navigation_version = "2.3.2"
-    implementation("androidx.navigation:navigation-fragment-ktx:$navigation_version")
-    implementation("androidx.navigation:navigation-ui-ktx:$navigation_version")
-    val lifecycle_version = "2.2.0"
-    implementation("androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version")
-    implementation("androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version")
+    implementation(libs.preference)
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.test.ext)
+    androidTestImplementation(libs.espresso)
+    implementation(libs.bundles.navigation)
+    implementation(libs.bundles.lifecycle)
 }
 
diff --git a/build.gradle.kts b/build.gradle.kts
index 762d9cf..09553d8 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -3,11 +3,7 @@ buildscript {
         google()
         mavenCentral()
     }
-    val coroutinesVersion by extra("1.3.2")
-    val hiltVersion by extra("2.36")
-    val koinVersion by extra("2.0.1")
     val kotlinVersion by extra("1.4.32")
-    val okHttpVersion by extra("4.2.2")
     dependencies {
         classpath("com.android.tools.build:gradle:7.0.0-beta03")
         classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlinVersion}")
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
new file mode 100644
index 0000000..60dfc05
--- /dev/null
+++ b/gradle/libs.versions.toml
@@ -0,0 +1,43 @@
+[versions]
+androidx-core = "1.3.2"
+androidx-appcompat = "1.2.0"
+coroutines = "1.4.3"
+espresso = "3.3.0"
+koin = "2.2.3"
+kotlin = "1.4.32"
+lifecycle = "2.2.0"
+material = "1.3.0"
+maxSdk = "30"
+moshi = "1.9.2"
+minSdk = "21"
+navigation = "2.3.2"
+okhttp = "4.2.2"
+versionCode = "1"
+versionName = "1.0"
+
+[libraries]
+androidx-core = { module = "androidx.core:core-ktx", version.ref = "androidx-core" }
+androidx-appcompat = { module = "androidx.appcompat:appcompat", version.ref = "androidx-appcompat" }
+material = { module = "com.google.android.material:material", version.ref = "material" }
+moshi-core = { module = "com.squareup.moshi:moshi", version.ref = "moshi" }
+moshi-codegen = { module = "com.squareup.moshi:moshi-kotlin-codegen", version.ref = "moshi" }
+navigation-fragment = { module = "androidx.navigation:navigation-fragment-ktx", version.ref = "navigation" }
+navigation-ui = { module = "androidx.navigation:navigation-ui-ktx", version.ref = "navigation" }
+coroutines-core = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-core", version.ref = "coroutines" }
+coroutines-android = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-android", version.ref = "coroutines" }
+preference = { module = "androidx.preference:preference-ktx", version = "1.1.1" }
+lifecycle-livedata = { module = "androidx.lifecycle:lifecycle-livedata-ktx", version.ref = "lifecycle" }
+lifecycle-viewmodel = { module = "androidx.lifecycle:lifecycle-viewmodel-ktx", version.ref = "lifecycle" }
+junit = { module = "junit:junit", version = "4.12" }
+kotlin-gradle = { module = "org.jetbrains.kotlin:kotlin-gradle-plugin", version.ref = "kotlin" }
+kotlin-stdlib = { module = "org.jetbrains.kotlin:kotlin-stdlib", version.ref = "kotlin" }
+kotlin-reflect = { module = "org.jetbrains.kotlin:kotlin-reflect", version.ref = "kotlin" }
+test-ext = { module = "androidx.test.ext:junit", version = "1.1.2" }
+espresso = { module = "androidx.test.espresso:espresso-core", version.ref = "espresso" }
+
+[bundles]
+coroutines = ["coroutines-core", "coroutines-android"]
+lifecycle = ["lifecycle-livedata", "lifecycle-viewmodel"]
+navigation = ["navigation-fragment", "navigation-ui"]
+
+
diff --git a/piholeclient/build.gradle.kts b/piholeclient/build.gradle.kts
index cac2aec..cba243b 100644
--- a/piholeclient/build.gradle.kts
+++ b/piholeclient/build.gradle.kts
@@ -5,10 +5,10 @@ plugins {
 }
 
 android {
-    compileSdk = 29
+    compileSdk = libs.versions.maxSdk.get().toInt()
     defaultConfig {
-        minSdk = 23
-        targetSdk = 29
+        minSdk = libs.versions.minSdk.get().toInt()
+        targetSdk = libs.versions.maxSdk.get().toInt()
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         consumerProguardFiles("consumer-rules.pro")
@@ -30,17 +30,14 @@ android {
 }
 
 dependencies {
-    implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk7:${rootProject.ext["kotlinVersion"]}")
-    implementation("org.jetbrains.kotlin:kotlin-reflect:${rootProject.ext["kotlinVersion"]}")
-    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:${rootProject.ext["coroutinesVersion"]}")
-    implementation("org.koin:koin-core:${rootProject.ext["koinVersion"]}")
-    implementation("com.squareup.okhttp3:okhttp:${rootProject.ext["okHttpVersion"]}")
-    implementation("com.squareup.okhttp3:logging-interceptor:${rootProject.ext["okHttpVersion"]}")
-    implementation("androidx.appcompat:appcompat:1.1.0")
-    implementation("androidx.core:core-ktx:1.1.0")
-    implementation("com.squareup.moshi:moshi:1.9.2")
-    kapt("com.squareup.moshi:moshi-kotlin-codegen:1.9.2")
-    testImplementation("junit:junit:4.12")
-    androidTestImplementation("androidx.test.ext:junit:1.1.1")
-    androidTestImplementation("androidx.test.espresso:espresso-core:3.2.0")
+    implementation("io.insert-koin:koin-core:${libs.versions.koin.get()}")
+    implementation("com.squareup.okhttp3:okhttp:${libs.versions.okhttp.get()}")
+    implementation("com.squareup.okhttp3:logging-interceptor:${libs.versions.okhttp.get()}")
+    implementation(libs.androidx.core)
+    implementation(libs.androidx.appcompat)
+    implementation(libs.bundles.coroutines)
+    implementation(libs.kotlin.reflect)
+    implementation(libs.moshi.core)
+    kapt(libs.moshi.codegen)
+    testImplementation(libs.junit)
 }
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 43167c2..9f2e607 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -1,3 +1,4 @@
+enableFeaturePreview("VERSION_CATALOGS")
 dependencyResolutionManagement {
     repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
     repositories {