diff --git a/build.gradle.kts b/build.gradle.kts
index b24c5056..894e92da 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,3 +1,5 @@
+import com.github.benmanes.gradle.versions.updates.DependencyUpdatesTask
+
 plugins {
   run {
     val kotlinVersion = "1.4.31"
@@ -9,12 +11,30 @@ plugins {
   id("com.github.ben-manes.versions") version "0.38.0"
 }
 
+fun isNonStable(version: String): Boolean {
+  val stableKeyword = listOf("RELEASE", "FINAL", "GA").any { version.toUpperCase().contains(it) }
+  val unstableKeyword = listOf("ALPHA", "RC").any { version.toUpperCase().contains(it) }
+  val regex = "^[0-9,.v-]+(-r)?$".toRegex()
+  val isStable = stableKeyword || regex.matches(version)
+  return unstableKeyword || !isStable
+}
+
 allprojects {
   repositories {
     mavenCentral()
   }
   apply(plugin = "org.jlleitschuh.gradle.ktlint")
   apply(plugin = "com.github.ben-manes.versions")
+
+  tasks.named<DependencyUpdatesTask>("dependencyUpdates").configure {
+    // disallow release candidates as upgradable versions from stable versions
+    rejectVersionIf {
+      isNonStable(candidate.version) && !isNonStable(currentVersion)
+    }
+    gradleReleaseChannel = "current"
+    checkConstraints = true
+  }
+
 }
 
 tasks.wrapper {
diff --git a/komga/build.gradle.kts b/komga/build.gradle.kts
index ecf08610..6baeaf14 100644
--- a/komga/build.gradle.kts
+++ b/komga/build.gradle.kts
@@ -1,4 +1,3 @@
-import com.github.benmanes.gradle.versions.updates.DependencyUpdatesTask
 import org.apache.tools.ant.taskdefs.condition.Os
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
@@ -257,20 +256,6 @@ openApi {
   forkProperties.set("-Dspring.profiles.active=claim")
 }
 
-fun isNonStable(version: String): Boolean {
-  val stableKeyword = listOf("RELEASE", "FINAL", "GA").any { version.toUpperCase().contains(it) }
-  val regex = "^[0-9,.v-]+(-r)?$".toRegex()
-  val isStable = stableKeyword || regex.matches(version)
-  return isStable.not()
-}
-tasks.named("dependencyUpdates", DependencyUpdatesTask::class.java).configure {
-  // disallow release candidates as upgradable versions from stable versions
-  rejectVersionIf {
-    isNonStable(candidate.version) && !isNonStable(currentVersion)
-  }
-  gradleReleaseChannel = "current"
-}
-
 configure<org.jlleitschuh.gradle.ktlint.KtlintExtension> {
   version.set("0.40.0")
   filter {