diff --git a/content/dev/build/android/_index.en.md b/content/dev/build/android/_index.en.md
index fdd70a6..ef77fbd 100644
--- a/content/dev/build/android/_index.en.md
+++ b/content/dev/build/android/_index.en.md
@@ -41,5 +41,6 @@ tar xzf so.tar.gz
 cp ../target/aarch64-linux-android/release/liblibrustdesk.so android/app/src/main/jniLibs/arm64-v8a/librustdesk.so
 # Run on your android device, not support simulator yet (Please do not ask why).
 # Good Luck!
+# openjdk 11 required, do not use higher or lower, both has problem
 flutter run
 ```
diff --git a/content/dev/build/android/_index.zh-cn.md b/content/dev/build/android/_index.zh-cn.md
index b83e70a..31e34ee 100644
--- a/content/dev/build/android/_index.zh-cn.md
+++ b/content/dev/build/android/_index.zh-cn.md
@@ -41,5 +41,6 @@ tar xzf so.tar.gz
 cp ../target/aarch64-linux-android/release/liblibrustdesk.so android/app/src/main/jniLibs/arm64-v8a/librustdesk.so
 # Run on your android device, not support simulator yet (Please do not ask why).
 # Good Luck!
+# openjdk 11 required, do not use higher or lower, both has problem
 flutter run
 ```
diff --git a/content/dev/build/android/_index.zh-tw.md b/content/dev/build/android/_index.zh-tw.md
index d27c231..f10ee95 100644
--- a/content/dev/build/android/_index.zh-tw.md
+++ b/content/dev/build/android/_index.zh-tw.md
@@ -41,5 +41,6 @@ tar xzf so.tar.gz
 cp ../target/aarch64-linux-android/release/liblibrustdesk.so android/app/src/main/jniLibs/arm64-v8a/librustdesk.so
 # Run on your android device, not support simulator yet (Please do not ask why).
 # Good Luck!
+# openjdk 11 required, do not use higher or lower, both has problem
 flutter run
 ```