diff --git a/build.gradle b/build.gradle
index 1845cdac..841ce276 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,42 +1,8 @@
 // root build.gradle
-buildscript {
-    ext {
-        android_gradle_plugin_version = '8.3.1'
-        material_design_version = '1.11.0'
-        kotlin_version = '1.9.21'
-        retrofit_version = '2.9.0'
-        gson_version = '2.10.1'
-        junit_version = '4.13.2'
-        flexbox_version = '3.0.0'
-
-        // DirCacheCheckout.java uses InputStream.transferTo() since 6.3; no such method on Android.
-        jgit_version = '6.2.0.202206071550-r' // instead of 6.5.0.202303070854-r
-        slf4j_version = '2.0.9'
-
-        androidx_appcompat_version = '1.6.1'
-        androidx_annotation_version = '1.6.0'
-        androidx_fragment_version = '1.6.2'
-        androidx_navigation_version = '2.7.7'
-        androidx_room_version = '2.6.1'
-        androidx_splash_version = '1.0.1'
-        androidx_recyclerview_version = '1.3.2'
-        androidx_preference_version = '1.2.1'
-        androidx_cardview_version = '1.0.0'
-
-        androidx_test_junit_version = '1.1.5'
-        androidx_test_core_version = '1.5.0'
-        androidx_test_monitor_version = '1.6.1'
-        androidx_test_runner_version = '1.5.2'
-        androidx_test_rules_version = '1.5.0'
-        androidx_test_uiautomator_version = '2.3.0'
-        androidx_test_espresso_version = '3.5.1'
-    }
-}
-
 plugins {
-    id 'com.android.application' version "$android_gradle_plugin_version" apply false
-    id 'com.android.library' version "$android_gradle_plugin_version" apply false
-    id 'androidx.navigation.safeargs' version "$androidx_navigation_version" apply false
+    alias(libs.plugins.android.application) apply false
+    alias(libs.plugins.android.library) apply false
+    alias(libs.plugins.androidx.navigation.safeargs) apply false
 }
 
 /** Version Settings, loaded from file `version.properties` */
@@ -74,9 +40,7 @@ allprojects {
             def requested = details.requested
             if (requested.group == 'org.jetbrains.kotlin') {
                 List<String> list = ['kotlin-stdlib', 'kotlin-stdlib-jdk7', 'kotlin-stdlib-jdk8', 'kotlin-stdlib-common']
-                if (list.contains(requested.name)) {
-                    details.useVersion "$kotlin_version"
-                }
+                if (list.contains(requested.name)) { details.useVersion libs.versions.kotlin.get() }
             }
         }
     }
diff --git a/library/build.gradle b/library/build.gradle
index 8cb130ec..6ee51419 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -1,5 +1,6 @@
 plugins {
-    id 'com.android.library'
+    alias(libs.plugins.android.library)
+    alias(libs.plugins.androidx.room)
     id 'maven-publish'
 }
 
@@ -16,20 +17,19 @@ android {
         targetSdk 34
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         consumerProguardFile "${project.rootDir}/proguard/consumer.pro"
-        javaCompileOptions {
-            annotationProcessorOptions {
-                arguments = [ "room.schemaLocation": "$rootDir/schema".toString() ]
-            }
-        }
     }
 
-    sourceSets.main.java.srcDirs = [ "src/main/java" ]
+    room {
+        schemaDirectory("${rootDir}/schema")
+    }
 
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_17
         targetCompatibility JavaVersion.VERSION_17
     }
 
+    sourceSets.main.java.srcDirs = [ "src/main/java" ]
+
     buildFeatures {
         buildConfig true
         dataBinding true
@@ -65,31 +65,31 @@ android {
 dependencies {
 
     // Material Design Components
-    implementation "com.google.android.material:material:$material_design_version"
+    implementation libs.material.design
 
     // Annotations
-    implementation "androidx.annotation:annotation:$androidx_annotation_version"
+    implementation libs.androidx.annotation
 
     // App Compat
-    implementation "androidx.appcompat:appcompat:$androidx_appcompat_version"
+    implementation libs.androidx.appcompat
 
     // Data-Binding Runtime
-    implementation "androidx.databinding:databinding-runtime:$android_gradle_plugin_version"
+    implementation libs.androidx.databinding
 
     // Room Runtime
-    annotationProcessor "androidx.room:room-compiler:$androidx_room_version"
-    testImplementation "androidx.room:room-testing:$androidx_room_version"
-    implementation "androidx.room:room-runtime:$androidx_room_version"
+    annotationProcessor libs.androidx.room.compiler
+    testImplementation libs.androidx.room.testing
+    implementation libs.androidx.room.runtime
 
     // Retrofit2
-    implementation "com.google.code.gson:gson:$gson_version"
-    implementation "com.squareup.retrofit2:retrofit:$retrofit_version"
-    implementation ("com.squareup.retrofit2:converter-gson:$retrofit_version") {
+    implementation libs.gson
+    implementation libs.retrofit
+    implementation (libs.retrofit.gson.converter) {
         exclude group: "com.google.code.gson", module: "gson"
     }
 
-    testImplementation "junit:junit:$junit_version"
-    androidTestImplementation "androidx.test.ext:junit:$androidx_test_junit_version"
+    testImplementation libs.junit
+    androidTestImplementation libs.androidx.test.junit
 }
 
 tasks.register('javadoc', Javadoc) {
diff --git a/libs.versions.toml b/libs.versions.toml
new file mode 100644
index 00000000..06fccd46
--- /dev/null
+++ b/libs.versions.toml
@@ -0,0 +1,65 @@
+[versions]
+android_gradle_plugin     = '8.3.1'
+material_design           = '1.11.0'
+kotlin                    = '1.9.22'
+retrofit                  = '2.9.0'
+gson                      = '2.10.1'
+junit                     = '4.13.2'
+flexbox                   = '3.0.0'
+jgit                      = '6.2.0.202206071550-r'
+slf4j                     = '2.0.9'
+androidx_appcompat        = '1.6.1'
+androidx_annotation       = '1.7.1'
+androidx_navigation       = '2.7.7'
+androidx_fragment         = '1.6.2'
+androidx_recyclerview     = '1.3.2'
+androidx_cardview         = '1.0.0'
+androidx_preference       = '1.2.1'
+androidx_room             = '2.6.1'
+androidx_splashscreen     = '1.0.1'
+androidx_test_junit       = '1.1.5'
+androidx_test_core        = '1.5.0'
+androidx_test_rules       = '1.5.0'
+androidx_test_runner      = '1.5.2'
+androidx_test_monitor     = '1.6.1'
+androidx_test_uiautomator = '2.3.0'
+androidx_test_espresso    = '3.5.1'
+
+[plugins]
+android_application               = { id = "com.android.application", version.ref = "android_gradle_plugin" }
+android_library                   = { id = "com.android.library", version.ref = "android_gradle_plugin" }
+androidx_navigation_safeargs      = { id = "androidx.navigation.safeargs", version.ref = "androidx_navigation" }
+androidx_room                     = { id = "androidx.room", version.ref = "androidx_room" }
+
+[libraries]
+material_design                   = { module = "com.google.android.material:material", version.ref = "material_design" }
+gson                              = { module = "com.google.code.gson:gson", version.ref = "gson" }
+junit                             = { module = "junit:junit", version.ref = "junit" }
+flexbox                           = { module = "com.google.android.flexbox:flexbox", version.ref = "flexbox" }
+retrofit                          = { module = "com.squareup.retrofit2:retrofit", version.ref = "retrofit" }
+retrofit_gson_converter           = { module = "com.squareup.retrofit2:converter-gson", version.ref = "retrofit" }
+# DirCacheCheckout.java uses InputStream.transferTo() since 6.3; no such method on Android.
+jgit                              = { module = "org.eclipse.jgit:org.eclipse.jgit", version.ref = "jgit" }
+slf4j                             = { module = "org.slf4j:slf4j-simple", version.ref = "slf4j" }
+androidx_databinding              = { module = "androidx.databinding:databinding-runtime", version.ref = "android_gradle_plugin" }
+androidx_appcompat                = { module = "androidx.appcompat:appcompat", version.ref = "androidx_appcompat" }
+androidx_annotation               = { module = "androidx.annotation:annotation", version.ref = "androidx_annotation" }
+androidx_fragment                 = { module = "androidx.fragment:fragment", version.ref = "androidx_fragment" }
+androidx_fragment_testing         = { module = "androidx.fragment:fragment-testing", version.ref = "androidx_fragment" }
+androidx_recyclerview             = { module = "androidx.recyclerview:recyclerview", version.ref = "androidx_recyclerview" }
+androidx_cardview                 = { module = "androidx.cardview:cardview", version.ref = "androidx_cardview" }
+androidx_preference               = { module = "androidx.preference:preference", version.ref = "androidx_preference" }
+androidx_navigation_testing       = { module = "androidx.navigation:navigation-testing", version.ref = "androidx_navigation" }
+androidx_navigation_fragment      = { module = "androidx.navigation:navigation-fragment", version.ref = "androidx_navigation" }
+androidx_room_testing             = { module = "androidx.room:room-testing", version.ref = "androidx_room" }
+androidx_room_compiler            = { module = "androidx.room:room-compiler", version.ref = "androidx_room" }
+androidx_room_runtime             = { module = "androidx.room:room-runtime", version.ref = "androidx_room" }
+androidx_splashscreen             = { module = "androidx.core:core-splashscreen", version.ref = "androidx_splashscreen" }
+androidx_test_monitor             = { module = "androidx.test:monitor", version.ref = "androidx_test_monitor" }
+androidx_test_junit               = { module = "androidx.test.ext:junit", version.ref = "androidx_test_junit" }
+androidx_test_core                = { module = "androidx.test:core", version.ref = "androidx_test_core" }
+androidx_test_rules               = { module = "androidx.test:rules", version.ref = "androidx_test_rules" }
+androidx_test_runner              = { module = "androidx.test:runner", version.ref = "androidx_test_runner" }
+androidx_test_uiautomator         = { module = "androidx.test.uiautomator:uiautomator", version.ref = "androidx_test_uiautomator" }
+androidx_espresso_core            = { module = "androidx.test.espresso:espresso-core", version.ref = "androidx_test_espresso" }
+androidx_espresso_web             = { module = "androidx.test.espresso:espresso-web", version.ref = "androidx_test_espresso" }
diff --git a/mobile/build.gradle b/mobile/build.gradle
index fb3fb8d6..921a94e2 100644
--- a/mobile/build.gradle
+++ b/mobile/build.gradle
@@ -1,7 +1,8 @@
 // :mobile build.gradle
 plugins {
-    id "com.android.application"
-    id "androidx.navigation.safeargs"
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.androidx.navigation.safeargs)
+    alias(libs.plugins.androidx.room)
 }
 
 /** Load API access-token from file `token.properties` */
@@ -27,18 +28,17 @@ android {
         minSdk 22
         targetSdk 34
         applicationId 'io.syslogic.github'
+        //noinspection GroovyConstructorNamedArguments
         manifestPlaceholders = [ accessToken: "" ]
         versionName rootProject.ext.get('versionName')
         versionCode rootProject.ext.get('versionCode')
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         testBuildType "debug"
         multiDexEnabled true
+    }
 
-        javaCompileOptions {
-            annotationProcessorOptions {
-                arguments = [ "room.schemaLocation": "$rootDir/schema".toString() ]
-            }
-        }
+    room {
+        schemaDirectory("${rootDir}/schema")
     }
 
     compileOptions {
@@ -47,8 +47,8 @@ android {
     }
 
     sourceSets {
-        main {
-            androidTest.assets.srcDirs += files("$projectDir/schemas".toString())
+        androidTest {
+            assets.srcDirs += files("$projectDir/schemas".toString())
         }
     }
 
@@ -80,6 +80,7 @@ android {
         debug {
             applicationIdSuffix ".debug"
             signingConfig signingConfigs.debug
+            //noinspection GroovyConstructorNamedArguments
             manifestPlaceholders = [ accessToken: "${accessToken}" ]
             renderscriptDebuggable true
             pseudoLocalesEnabled false
@@ -91,6 +92,7 @@ android {
         }
         release {
             signingConfig signingConfigs.release
+            //noinspection GroovyConstructorNamedArguments
             manifestPlaceholders = [ accessToken: "" ]
             proguardFile "${project.rootDir}/proguard/android.pro"
             proguardFile "${project.rootDir}/proguard/androidx.pro"
@@ -122,73 +124,73 @@ dependencies {
     api project(path: ':library')
 
     // Material Design Components
-    implementation "com.google.android.material:material:$material_design_version"
+    implementation libs.material.design
 
     // Annotations
-    implementation "androidx.annotation:annotation:$androidx_annotation_version"
+    implementation libs.androidx.annotation
 
     // Flexbox Layout
-    implementation "com.google.android.flexbox:flexbox:$flexbox_version"
+    implementation libs.flexbox
 
     // https://developer.android.com/jetpack/androidx/
-    implementation "androidx.appcompat:appcompat:$androidx_appcompat_version"
-    implementation "androidx.core:core-splashscreen:$androidx_splash_version"
-    implementation "androidx.recyclerview:recyclerview:$androidx_recyclerview_version"
-    implementation "androidx.preference:preference:$androidx_preference_version"
-    implementation "androidx.cardview:cardview:$androidx_cardview_version"
+    implementation libs.androidx.appcompat
+    implementation libs.androidx.splashscreen
+    implementation libs.androidx.recyclerview
+    implementation libs.androidx.preference
+    implementation libs.androidx.cardview
 
     // Navigation
-    androidTestImplementation "androidx.navigation:navigation-testing:$androidx_navigation_version"
-    implementation "androidx.navigation:navigation-fragment:$androidx_navigation_version"
+    androidTestImplementation libs.androidx.navigation.testing
+    implementation libs.androidx.navigation.fragment
 
     // Fragment
-    androidTestImplementation "androidx.fragment:fragment-testing:$androidx_fragment_version"
-    implementation "androidx.fragment:fragment:$androidx_fragment_version"
+    androidTestImplementation libs.androidx.fragment.testing
+    implementation libs.androidx.fragment
 
     // Room Runtime
-    annotationProcessor "androidx.room:room-compiler:$androidx_room_version"
-    testImplementation "androidx.room:room-testing:$androidx_room_version"
-    implementation "androidx.room:room-runtime:$androidx_room_version"
+    annotationProcessor libs.androidx.room.compiler
+    testImplementation libs.androidx.room.testing
+    implementation libs.androidx.room.runtime
 
     // Retrofit2
-    implementation "com.google.code.gson:gson:$gson_version"
-    implementation "com.squareup.retrofit2:retrofit:$retrofit_version"
-    implementation ("com.squareup.retrofit2:converter-gson:$retrofit_version") {
+    implementation libs.gson
+    implementation libs.retrofit
+    implementation (libs.retrofit.gson.converter) {
         exclude group: "com.google.code.gson", module: "gson"
     }
 
     // https://mvnrepository.com/artifact/org.eclipse.jgit/org.eclipse.jgit
-    implementation "org.eclipse.jgit:org.eclipse.jgit:$jgit_version"
+    implementation libs.jgit
 
     // https://mvnrepository.com/artifact/org.slf4j/slf4j-simple
     // api "org.slf4j:slf4j-nop:$slf4j_version"
-    api "org.slf4j:slf4j-simple:$slf4j_version"
+    api libs.slf4j
 
     // jUnit
-    testImplementation "junit:junit:$junit_version"
+    testImplementation libs.junit
 
     // Required for connected tests.
     // https://mvnrepository.com/artifact/androidx.test/monitor
-    debugImplementation "androidx.test:monitor:$androidx_test_monitor_version"
+    debugImplementation libs.androidx.test.monitor
 
     // https://mvnrepository.com/artifact/androidx.test.ext
-    androidTestImplementation "androidx.test.ext:junit:$androidx_test_junit_version"
+    androidTestImplementation libs.androidx.test.junit
 
     // https://mvnrepository.com/artifact/androidx.test
     // https://developer.android.com/jetpack/androidx/releases/test
-    androidTestImplementation "androidx.test:core:$androidx_test_core_version"
-    androidTestImplementation "androidx.test:runner:$androidx_test_runner_version"
-    androidTestImplementation "androidx.test:rules:$androidx_test_rules_version"
+    androidTestImplementation libs.androidx.test.core
+    androidTestImplementation libs.androidx.test.runner
+    androidTestImplementation libs.androidx.test.rules
 
     // https://mvnrepository.com/artifact/androidx.test.uiautomator/uiautomator
-    androidTestImplementation "androidx.test.uiautomator:uiautomator:$androidx_test_uiautomator_version"
+    androidTestImplementation libs.androidx.test.uiautomator
 
     // Espresso
-    androidTestImplementation "androidx.test.espresso:espresso-core:$androidx_test_espresso_version"
+    androidTestImplementation libs.androidx.espresso.core
+    androidTestImplementation libs.androidx.espresso.web
     // androidTestImplementation "androidx.test.espresso:espresso-contrib:$androidx_test_espresso_version"
     // androidTestImplementation "androidx.test.espresso:espresso-intents:$androidx_test_espresso_version"
     // androidTestImplementation "androidx.test.espresso:espresso-accessibility:$androidx_test_espresso_version"
-    androidTestImplementation "androidx.test.espresso:espresso-web:$androidx_test_espresso_version"
     // androidTestImplementation "androidx.test.espresso.idling:idling-concurrent:$espresso_version"
 
     // The following dependency can be either "implementation" or "androidTestImplementation",
diff --git a/settings.gradle b/settings.gradle
index 384f0808..feb09e34 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -13,6 +13,11 @@ dependencyResolutionManagement {
         mavenCentral()
         google()
     }
+    versionCatalogs {
+        libs {
+            from(files("libs.versions.toml"))
+        }
+    }
 }
 
 rootProject.name = "GitHub Client"
diff --git a/version.properties b/version.properties
index 60e799c1..81ac5417 100644
--- a/version.properties
+++ b/version.properties
@@ -1,2 +1,2 @@
-versionName = 1.0.2
+versionName = 1.0.3
 versionCode = 3