diff --git a/Dockerfile b/Dockerfile
index 83d000e..69f112f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,6 +2,7 @@ FROM alpine:latest
 
 RUN apk update --no-cache \
  && apk add --no-cache openssh-client openssh-keygen shadow pacman runuser git \
+ grep \
  && rm -rf /var/cache/apk/*
 
 COPY entrypoint.sh /entrypoint.sh