diff --git a/Dockerfile.template.erb b/Dockerfile.template.erb
index 695b699..84d06b7 100644
--- a/Dockerfile.template.erb
+++ b/Dockerfile.template.erb
@@ -18,7 +18,7 @@ FROM mcr.microsoft.com/dotnet/framework/runtime:4.8-windowsservercore-<%= window
 <% if is_armhf %>
 FROM resin/armhf-alpine:3.7
 <% else %>
-FROM alpine:3.19
+FROM alpine:3.20
 <% end %>
 <% else %>
 <% if is_armhf %>
diff --git a/v1.17/alpine/Dockerfile b/v1.17/alpine/Dockerfile
index ab417b1..60fb8b9 100644
--- a/v1.17/alpine/Dockerfile
+++ b/v1.17/alpine/Dockerfile
@@ -1,7 +1,7 @@
 # AUTOMATICALLY GENERATED
 # DO NOT EDIT THIS FILE DIRECTLY, USE /Dockerfile.template.erb
 
-FROM alpine:3.19
+FROM alpine:3.20
 LABEL maintainer "Fluentd developers <fluentd@googlegroups.com>"
 LABEL Description="Fluentd docker image" Vendor="Fluent Organization" Version="1.17.1"