diff --git a/Dockerfile b/Dockerfile
index beac581..c7fe117 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM alpine:latest
 
 ARG USER="user"
 
-RUN apk add --no-cache kubectl gpg && \
+RUN apk add --no-cache kubectl gpg bash && \
     addgroup $USER && \
     adduser -G $USER -D $USER