diff --git a/samples/ui/build.sh b/samples/ui/build.sh
old mode 100644
new mode 100755
index 937eb18..8001b8d
--- a/samples/ui/build.sh
+++ b/samples/ui/build.sh
@@ -24,4 +24,4 @@ wasmFlags="--target=wasm32 \
 
 $CLANG $wasmFlags -o ./module.wasm ../../sdk/orca.c ../../cstdlib/src/*.c src/main.c
 
-python3 ../../scripts/mkapp.py --orca-dir ../.. --name UI --resource-dir data module.wasm
+orca bundle --orca-dir ../.. --name UI --resource-dir data module.wasm