diff --git a/auth0_flutter/README.md b/auth0_flutter/README.md
index 4a8b471d..a58bf733 100644
--- a/auth0_flutter/README.md
+++ b/auth0_flutter/README.md
@@ -143,7 +143,7 @@ android {
     defaultConfig {
         // ...
         // Add the following line
-        manifestPlaceholders = [auth0Domain: "YOUR_AUTH0_DOMAIN", auth0Scheme: "https"]
+        manifestPlaceholders += [auth0Domain: "YOUR_AUTH0_DOMAIN", auth0Scheme: "https"]
     }
     // ...
 }
diff --git a/auth0_flutter/example/android/app/build.gradle b/auth0_flutter/example/android/app/build.gradle
index bc187f64..8b6c12d1 100644
--- a/auth0_flutter/example/android/app/build.gradle
+++ b/auth0_flutter/example/android/app/build.gradle
@@ -54,7 +54,7 @@ android {
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
-        manifestPlaceholders = [auth0Domain: "$System.env.AUTH0_DOMAIN",
+        manifestPlaceholders += [auth0Domain: "$System.env.AUTH0_DOMAIN",
                                 auth0Scheme: "$System.env.AUTH0_CUSTOM_SCHEME"]
 
         testOptions {