diff --git a/Dockerfile b/Dockerfile
index 3186d4e..17b8bb9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -39,6 +39,7 @@ RUN tlmgr update --self && \
     transparent
 
 RUN apk upgrade && apk add --no-cache \
+    bash \
     nodejs \
     npm \
     chromium