diff --git a/Dockerfile b/Dockerfile
index c186eb1..310b3e3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
 FROM alpine
-RUN apk update && apk add openssh-client sshpass rsync gzip && rm -r /var/cache/
+RUN apk update && apk add ca-certificates openssh-client sshpass rsync gzip && rm -r /var/cache/
 ADD mark2web /
 CMD ["/mark2web"]