diff --git a/Dockerfile b/Dockerfile
index edc2625..5f376e9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.12
+FROM alpine:3.13
 
 LABEL maintainer="Peter Dave Hello <hsu@peterdavehello.org>"
 LABEL name="tor-socks-proxy"