diff --git a/rspamd/Dockerfile b/rspamd/Dockerfile
index 3b36f101..0214071a 100644
--- a/rspamd/Dockerfile
+++ b/rspamd/Dockerfile
@@ -2,7 +2,7 @@ FROM alpine:edge
 
 # We have to upgrade musl, or rspamd will not work.
 RUN echo 'http://dl-cdn.alpinelinux.org/alpine/edge/testing' >> /etc/apk/repositories \
- && apk add --no-cache rspamd rsyslog
+ && apk add --no-cache rspamd rsyslog ca-certificates
 
 RUN mkdir /run/rspamd