diff --git a/s3cmd/Dockerfile b/s3cmd/Dockerfile
index 0d85265..9e8b221 100644
--- a/s3cmd/Dockerfile
+++ b/s3cmd/Dockerfile
@@ -11,6 +11,7 @@ FROM debian:sid
 MAINTAINER Jessica Frazelle <jess@docker.com>
 
 RUN apt-get update && apt-get install -y \
+	ca-certificates \
 	s3cmd \
 	--no-install-recommends \
 	&& rm -rf /var/lib/apt/lists/*