diff --git a/enabling_splash_screen/android/app/build.gradle b/enabling_splash_screen/android/app/build.gradle
index ccbf98f..633ab5d 100644
--- a/enabling_splash_screen/android/app/build.gradle
+++ b/enabling_splash_screen/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/handling_routes/android/app/build.gradle b/handling_routes/android/app/build.gradle
index 5de71ca..57e9707 100644
--- a/handling_routes/android/app/build.gradle
+++ b/handling_routes/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/load_local_image/android/app/build.gradle b/load_local_image/android/app/build.gradle
index 8a5a620..a09fbeb 100644
--- a/load_local_image/android/app/build.gradle
+++ b/load_local_image/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/load_local_json/android/app/build.gradle b/load_local_json/android/app/build.gradle
index 78a07c2..d8044eb 100644
--- a/load_local_json/android/app/build.gradle
+++ b/load_local_json/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/navigation_drawer/android/app/build.gradle b/navigation_drawer/android/app/build.gradle
index a4b941f..7af75c2 100644
--- a/navigation_drawer/android/app/build.gradle
+++ b/navigation_drawer/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/simple_material_app/android/app/build.gradle b/simple_material_app/android/app/build.gradle
index 1fac114..c52bef4 100644
--- a/simple_material_app/android/app/build.gradle
+++ b/simple_material_app/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/stateful_widget/android/app/build.gradle b/stateful_widget/android/app/build.gradle
index 39a4385..aad5fc9 100644
--- a/stateful_widget/android/app/build.gradle
+++ b/stateful_widget/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/stateless_widgets/android/app/build.gradle b/stateless_widgets/android/app/build.gradle
index e8c3dc9..af2e7ec 100644
--- a/stateless_widgets/android/app/build.gradle
+++ b/stateless_widgets/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/tip_calculator/android/app/build.gradle b/tip_calculator/android/app/build.gradle
index 5414c3e..69b146f 100644
--- a/tip_calculator/android/app/build.gradle
+++ b/tip_calculator/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/using_alert_dialog/android/app/build.gradle b/using_alert_dialog/android/app/build.gradle
index f557412..b76f9d4 100644
--- a/using_alert_dialog/android/app/build.gradle
+++ b/using_alert_dialog/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/using_bottom_nav_bar/android/app/build.gradle b/using_bottom_nav_bar/android/app/build.gradle
index 4880935..ff93c87 100644
--- a/using_bottom_nav_bar/android/app/build.gradle
+++ b/using_bottom_nav_bar/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/using_custom_fonts/android/app/build.gradle b/using_custom_fonts/android/app/build.gradle
index 7c4639a..6d12601 100644
--- a/using_custom_fonts/android/app/build.gradle
+++ b/using_custom_fonts/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/using_edittext/android/app/build.gradle b/using_edittext/android/app/build.gradle
index 2adc79a..4c1c27a 100644
--- a/using_edittext/android/app/build.gradle
+++ b/using_edittext/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/using_gradient/android/app/build.gradle b/using_gradient/android/app/build.gradle
index e525887..012c6c9 100644
--- a/using_gradient/android/app/build.gradle
+++ b/using_gradient/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/using_http_get/android/app/build.gradle b/using_http_get/android/app/build.gradle
index 462bc16..d24462e 100644
--- a/using_http_get/android/app/build.gradle
+++ b/using_http_get/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/using_listview/android/app/build.gradle b/using_listview/android/app/build.gradle
index 7b663d0..a043bd4 100644
--- a/using_listview/android/app/build.gradle
+++ b/using_listview/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/using_snackbar/android/app/build.gradle b/using_snackbar/android/app/build.gradle
index ee5a6c8..cc09e8d 100644
--- a/using_snackbar/android/app/build.gradle
+++ b/using_snackbar/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/using_stepper/android/app/build.gradle b/using_stepper/android/app/build.gradle
index a4c8622..26e0a72 100644
--- a/using_stepper/android/app/build.gradle
+++ b/using_stepper/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/using_tabs/android/app/build.gradle b/using_tabs/android/app/build.gradle
index fe25354..5f65ccb 100644
--- a/using_tabs/android/app/build.gradle
+++ b/using_tabs/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }
diff --git a/using_theme/android/app/build.gradle b/using_theme/android/app/build.gradle
index 170c759..31edd29 100644
--- a/using_theme/android/app/build.gradle
+++ b/using_theme/android/app/build.gradle
@@ -46,7 +46,7 @@ flutter {
 }
 
 dependencies {
-    androidTestCompile 'com.android.support:support-annotations:25.4.0'
+    androidTestCompile 'com.android.support:support-annotations:28.0.0'
     androidTestCompile 'com.android.support.test:runner:0.5'
     androidTestCompile 'com.android.support.test:rules:0.5'
 }