diff --git a/Dockerfile b/Dockerfile
index ba09a0a..be47de2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -22,6 +22,7 @@ FROM alpine AS alpine
 COPY --from=build /go/src/github.com/SenseUnit/dumbproxy/dumbproxy /
 COPY --from=build /certs.crt /etc/ssl/certs/ca-certificates.crt
 COPY --from=build --chown=9999:9999 /.dumbproxy /.dumbproxy
+RUN apk add --no-cache tzdata
 USER 9999:9999
 EXPOSE 8080/tcp
 ENTRYPOINT ["/dumbproxy", "-bind-address", ":8080"]