diff --git a/docker/nginx/Dockerfile b/docker/nginx/Dockerfile
index 40c3465..1a9c499 100644
--- a/docker/nginx/Dockerfile
+++ b/docker/nginx/Dockerfile
@@ -1,4 +1,4 @@
-FROM nginx:1.23.0-alpine
+FROM nginx:1.23.4-alpine
 
 RUN apk --no-cache add tzdata && \
     cp /usr/share/zoneinfo/Asia/Tokyo /etc/localtime && \