diff --git a/aplazame-android-sdk/build.gradle b/aplazame-android-sdk/build.gradle
index 02c4ee4..74d9792 100644
--- a/aplazame-android-sdk/build.gradle
+++ b/aplazame-android-sdk/build.gradle
@@ -23,7 +23,7 @@ android {
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation 'com.android.support:appcompat-v7:26.0.0'
+    implementation 'com.android.support:appcompat-v7:28.0.0'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'com.android.support.test:runner:1.0.2'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
diff --git a/demo/build.gradle b/demo/build.gradle
index b3f0c72..c940578 100644
--- a/demo/build.gradle
+++ b/demo/build.gradle
@@ -33,7 +33,7 @@ android {
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
 
-    implementation 'com.android.support:appcompat-v7:26.1.0'
+    implementation 'com.android.support:appcompat-v7:28.0.0'
     implementation 'com.android.support.constraint:constraint-layout:1.0.2'
 
     implementation project(':aplazame-android-sdk')