diff --git a/android/build.gradle b/android/build.gradle
index f8f0e43..3df186d 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -24,6 +24,19 @@ allprojects {
     }
 }
 
+subprojects {
+    afterEvaluate { project ->
+        if (project.hasProperty("android")) {
+            android {
+                compileOptions {
+                    sourceCompatibility JavaVersion.VERSION_21
+                    targetCompatibility JavaVersion.VERSION_21
+                }
+            }
+        }
+    }
+}
+
 task clean(type: Delete) {
     delete rootProject.buildDir
 }