diff --git a/Dockerfile b/Dockerfile
index d2bc2b0..dba0425 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.8
+FROM alpine:3.9
 
 LABEL maintainer="Peter Dave Hello <hsu@peterdavehello.org>"
 LABEL name="tor-socks-proxy"