diff --git a/app/build.gradle b/app/build.gradle
index c92e6382e..2b813a86d 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -28,7 +28,7 @@ android {
     buildToolsVersion "29.0.2"
     defaultConfig {
         applicationId "com.tencent.iot.explorer.link.opensource"
-        minSdkVersion 21
+        minSdkVersion 26
         targetSdkVersion 29
         versionCode rootProject.ext.android.versionCode
         versionName rootProject.ext.android.versionName
diff --git a/sdk/video-link-android/build.gradle b/sdk/video-link-android/build.gradle
index ebceb7f32..0a0b754a1 100644
--- a/sdk/video-link-android/build.gradle
+++ b/sdk/video-link-android/build.gradle
@@ -10,7 +10,7 @@ android {
     buildToolsVersion "30.0.2"
 
     defaultConfig {
-        minSdkVersion 16
+        minSdkVersion 24
         targetSdkVersion 29
         versionCode 1
         versionName "1.0"
diff --git a/sdkdemo/build.gradle b/sdkdemo/build.gradle
index f9260706f..c159f365a 100644
--- a/sdkdemo/build.gradle
+++ b/sdkdemo/build.gradle
@@ -27,7 +27,7 @@ android {
     buildToolsVersion "29.0.2"
     defaultConfig {
         applicationId "com.tencent.iot.explorer.link.sdkdemo"
-        minSdkVersion 19
+        minSdkVersion 26
         targetSdkVersion 29
         versionCode 3
         versionName rootProject.ext.android.versionSDKDemoName