diff --git a/Dockerfile b/Dockerfile
index 9b48dc6..5c942d5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM alpine:3.5
 MAINTAINER "EEA: IDM2 A-Team" <eea-edw-a-team-alerts@googlegroups.com>
 
-RUN apk add --no-cache --virtual .run-deps rsync openssh tzdata curl
+RUN apk add --no-cache --virtual .run-deps rsync openssh tzdata curl ca-certificates && rm -rf /var/cache/apk/*
 COPY docker-entrypoint.sh /
 
 ENTRYPOINT ["/docker-entrypoint.sh"]