diff --git a/build.gradle b/build.gradle
index 48da86c..5926d9b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -61,7 +61,8 @@ android {
 
 dependencies {
     compileOnly 'androidx.legacy:legacy-support-v4:1.0.0'
-    api 'com.urbanairship.android:urbanairship-core:20.3.0'
+    // Allow any 20.x; consumers can override to a specific 20.x in their app build.
+    api 'com.urbanairship.android:urbanairship-core:[20.3.0,21.0.0)'
     testImplementation 'junit:junit:4.13.2'
     testImplementation files('libs/java-json.jar')
 }