diff --git a/tools/serving_build.sh b/tools/serving_build.sh
index 7e8e1aa9bd0fbb6582906496cda7cc9a218ab92c..66dcf5ff8d3845eac8bb8f2980407bf67a75a36c 100644
--- a/tools/serving_build.sh
+++ b/tools/serving_build.sh
@@ -53,6 +53,7 @@ function build_app() {
     local DIRNAME=build-app-$TYPE
     mkdir $DIRNAME # pwd: /Serving
     cd $DIRNAME # pwd: /Serving/build-app-$TYPE
+    pip install numpy sentencepiece
     case $TYPE in
         CPU|GPU)
             cmake -DPYTHON_INCLUDE_DIR=$PYTHONROOT/include/python2.7/ \