diff --git a/Dockerfile b/Dockerfile
index e2579bf..1cd81bd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -49,4 +49,6 @@ RUN ln -snf /usr/share/zoneinfo/$ARG_TZ /etc/localtime && echo $ARG_TZ > /etc/ti
                   lsb-release \
                   wget
 
+RUN npm install -g yarn
+
 RUN curl -sL firebase.tools | bash