diff --git a/Dockerfile b/Dockerfile
index f85a4b7..5cc3af1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,7 @@
 FROM alpine:3.3
 
 RUN apk update
+RUN apk add --no-cache bash
 RUN apk add python py-pip py-setuptools git ca-certificates
 RUN pip install python-dateutil