diff --git a/Dockerfile b/Dockerfile
index 04648da..b1ad660 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM alpine:3.10
 
 RUN apk upgrade --update \
-    apk add --no-cache openssh \
+    && apk add --update openssh \
     && rm -rf /tmp/* /usr/share/man /var/cache/apk/*
 
 COPY . /