diff --git a/Dockerfile b/Dockerfile
index 89617ec..8bd445b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,5 @@
 FROM alpine:3.10
+RUN apk --no-cache add ca-certificates
 RUN wget https://github.com/aleph-engineering/rocketchat-notification/releases/download/1.4.1/rocketchat-notification -P /usr/bin/ && chmod +x /usr/bin/rocketchat-notification
 COPY entrypoint.sh /entrypoint.sh
 ENTRYPOINT ["/entrypoint.sh"]