diff --git a/build.sh b/build.sh
index fddac46e..4c65a1a6 100644
--- a/build.sh
+++ b/build.sh
@@ -14,7 +14,7 @@ aosp="android-8.1.0_r65"
 phh="android-8.1"
 
 if [ "$1" == "android-9.0" ];then
-    aosp="android-9.0.0_r45"
+    aosp="android-9.0.0_r47"
     phh="android-9.0"
 fi