diff --git a/Dockerfile b/Dockerfile
index e31d97d..0a43027 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,7 +10,7 @@ COPY . .
 RUN yarn build
 
 # production stage
-FROM alpine:3.11
+FROM alpine:3.15
 
 ENV USER darkhttpd
 ENV GROUP darkhttpd