diff --git a/Dockerfile b/Dockerfile
index d4f0e61767..dc493da14d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,7 @@ RUN make swarm
 FROM ethereum/client-go:v1.8.27 as geth
 
 FROM alpine:3.9
-RUN apk --no-cache add ca-certificates
+RUN apk --no-cache add ca-certificates && update-ca-certificates
 COPY --from=builder /swarm/build/bin/swarm /usr/local/bin/
 COPY --from=geth /usr/local/bin/geth /usr/local/bin/
 COPY docker/run.sh /run.sh