diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 872de07ee..f93ca7a5c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -380,7 +380,7 @@ jobs:
           go install golang.org/x/mobile/cmd/gomobile@latest
           go get golang.org/x/mobile/bind
           gomobile init
-          gomobile bind -tags nosqlite -ldflags="-w -s -X github.com/GopeedLab/gopeed/pkg/base.Version=$VERSION" -o ui/flutter/android/app/libs/libgopeed.aar -target=android -androidapi 19 -javapkg=com.gopeed github.com/GopeedLab/gopeed/bind/mobile
+          gomobile bind -tags nosqlite -ldflags="-w -s -X github.com/GopeedLab/gopeed/pkg/base.Version=$VERSION" -o ui/flutter/android/app/libs/libgopeed.aar -target=android -androidapi 21 -javapkg=com.gopeed github.com/GopeedLab/gopeed/bind/mobile
           cd ui/flutter
           echo $APK_KEYSTORE | base64 -di > android/app/upload-keystore.jks
           flutter build apk
diff --git a/README.md b/README.md
index 6773c74ad..4bc3f9b7f 100644
--- a/README.md
+++ b/README.md
@@ -174,7 +174,7 @@ command:
 - android
 
 ```bash
-gomobile bind -tags nosqlite -ldflags="-w -s" -o ui/flutter/android/app/libs/libgopeed.aar -target=android -androidapi 19 -javapkg="com.gopeed" github.com/GopeedLab/gopeed/bind/mobile
+gomobile bind -tags nosqlite -ldflags="-w -s" -o ui/flutter/android/app/libs/libgopeed.aar -target=android -androidapi 21 -javapkg="com.gopeed" github.com/GopeedLab/gopeed/bind/mobile
 cd ui/flutter
 flutter build apk
 ```
diff --git a/README_ja-JP.md b/README_ja-JP.md
index bd702e843..61e5bf2b2 100644
--- a/README_ja-JP.md
+++ b/README_ja-JP.md
@@ -162,7 +162,7 @@ gomobile init
 - android
 
 ```bash
-gomobile bind -tags nosqlite -ldflags="-w -s" -o ui/flutter/android/app/libs/libgopeed.aar -target=android -androidapi 19 -javapkg="com.gopeed" github.com/GopeedLab/gopeed/bind/mobile
+gomobile bind -tags nosqlite -ldflags="-w -s" -o ui/flutter/android/app/libs/libgopeed.aar -target=android -androidapi 21 -javapkg="com.gopeed" github.com/GopeedLab/gopeed/bind/mobile
 cd ui/flutter
 flutter build apk
 ```
diff --git a/README_vi-VN.md b/README_vi-VN.md
index fff9b0e01..2a5f45e6f 100644
--- a/README_vi-VN.md
+++ b/README_vi-VN.md
@@ -170,7 +170,7 @@ command:
 - android
 
 ```bash
-gomobile bind -tags nosqlite -ldflags="-w -s" -o ui/flutter/android/app/libs/libgopeed.aar -target=android -androidapi 19 -javapkg="com.gopeed" github.com/GopeedLab/gopeed/bind/mobile
+gomobile bind -tags nosqlite -ldflags="-w -s" -o ui/flutter/android/app/libs/libgopeed.aar -target=android -androidapi 21 -javapkg="com.gopeed" github.com/GopeedLab/gopeed/bind/mobile
 cd ui/flutter
 flutter build apk
 ```
diff --git a/README_zh-CN.md b/README_zh-CN.md
index 58f4bf241..907843583 100644
--- a/README_zh-CN.md
+++ b/README_zh-CN.md
@@ -174,7 +174,7 @@ gomobile init
 - android
 
 ```bash
-gomobile bind -tags nosqlite -ldflags="-w -s" -o ui/flutter/android/app/libs/libgopeed.aar -target=android -androidapi 19 -javapkg="com.gopeed" github.com/GopeedLab/gopeed/bind/mobile
+gomobile bind -tags nosqlite -ldflags="-w -s" -o ui/flutter/android/app/libs/libgopeed.aar -target=android -androidapi 21 -javapkg="com.gopeed" github.com/GopeedLab/gopeed/bind/mobile
 cd ui/flutter
 flutter build apk
 ```
diff --git a/README_zh-TW.md b/README_zh-TW.md
index 849fc1996..fd59a67b3 100644
--- a/README_zh-TW.md
+++ b/README_zh-TW.md
@@ -170,7 +170,7 @@ gomobile init
 - android
 
 ```bash
-gomobile bind -tags nosqlite -ldflags="-w -s" -o ui/flutter/android/app/libs/libgopeed.aar -target=android -androidapi 19 -javapkg="com.gopeed" github.com/GopeedLab/gopeed/bind/mobile
+gomobile bind -tags nosqlite -ldflags="-w -s" -o ui/flutter/android/app/libs/libgopeed.aar -target=android -androidapi 21 -javapkg="com.gopeed" github.com/GopeedLab/gopeed/bind/mobile
 cd ui/flutter
 flutter build apk
 ```