diff --git a/amethyst/build.gradle b/amethyst/build.gradle
index 2f10490dd..83082f576 100644
--- a/amethyst/build.gradle
+++ b/amethyst/build.gradle
@@ -7,12 +7,12 @@ plugins {
 
 android {
     namespace 'com.vitorpamplona.amethyst'
-    compileSdk 34
+    compileSdk libs.versions.android.compileSdk.get().toInteger()
 
     defaultConfig {
         applicationId "com.vitorpamplona.amethyst"
-        minSdk 26
-        targetSdk 34
+        minSdk libs.versions.android.minSdk.get().toInteger()
+        targetSdk libs.versions.android.targetSdk.get().toInteger()
         versionCode 385
         versionName "0.88.8"
         buildConfigField "String", "RELEASE_NOTES_ID", "\"2a34cbadd03212c8162e1ff896ba12641821088a2ec8d5e40d54aa80c0510800\""
diff --git a/ammolite/build.gradle b/ammolite/build.gradle
index 68a716057..93dba5327 100644
--- a/ammolite/build.gradle
+++ b/ammolite/build.gradle
@@ -7,11 +7,11 @@ plugins {
 
 android {
     namespace 'com.vitorpamplona.ammolite'
-    compileSdk 34
+    compileSdk libs.versions.android.compileSdk.get().toInteger()
 
     defaultConfig {
-        minSdk 26
-        targetSdk 34
+        minSdk libs.versions.android.minSdk.get().toInteger()
+        targetSdk libs.versions.android.targetSdk.get().toInteger()
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         consumerProguardFiles "consumer-rules.pro"
diff --git a/benchmark/build.gradle b/benchmark/build.gradle
index 69322e88c..c56b90ca0 100644
--- a/benchmark/build.gradle
+++ b/benchmark/build.gradle
@@ -8,11 +8,11 @@ plugins {
 
 android {
     namespace 'com.vitorpamplona.amethyst.benchmark'
-    compileSdk 34
+    compileSdk libs.versions.android.compileSdk.get().toInteger()
 
     defaultConfig {
-        minSdk 26
-        targetSdk 34
+        minSdk libs.versions.android.minSdk.get().toInteger()
+        targetSdk libs.versions.android.targetSdk.get().toInteger()
 
         // Enable measuring on an emulator, or devices with low battery
         testInstrumentationRunner 'androidx.benchmark.junit4.AndroidBenchmarkRunner'
diff --git a/commons/build.gradle b/commons/build.gradle
index d5f453dd9..37614f930 100644
--- a/commons/build.gradle
+++ b/commons/build.gradle
@@ -8,10 +8,11 @@ plugins {
 
 android {
     namespace 'com.vitorpamplona.amethyst.commons'
-    compileSdk 34
+    compileSdk libs.versions.android.compileSdk.get().toInteger()
 
     defaultConfig {
-        minSdk 26
+        minSdk libs.versions.android.minSdk.get().toInteger()
+        targetSdk libs.versions.android.targetSdk.get().toInteger()
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         consumerProguardFiles "consumer-rules.pro"
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 51c3f6e18..3e5ba2eaa 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -2,6 +2,9 @@
 accompanistAdaptive = "0.34.0"
 activityCompose = "1.9.0"
 agp = "8.5.0"
+android-compileSdk = "34"
+android-minSdk = "26"
+android-targetSdk = "34"
 androidKotlinGeohash = "1.0"
 androidxJunit = "1.2.1"
 appcompat = "1.7.0"
diff --git a/quartz/build.gradle b/quartz/build.gradle
index 73e7d7298..0baaf80c7 100644
--- a/quartz/build.gradle
+++ b/quartz/build.gradle
@@ -7,11 +7,11 @@ plugins {
 
 android {
     namespace 'com.vitorpamplona.quartz'
-    compileSdk 34
+    compileSdk libs.versions.android.compileSdk.get().toInteger()
 
     defaultConfig {
-        minSdk 26
-        targetSdk 34
+        minSdk libs.versions.android.minSdk.get().toInteger()
+        targetSdk libs.versions.android.targetSdk.get().toInteger()
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         consumerProguardFiles "consumer-rules.pro"