diff --git a/docker/Dockerfile.linux.amd64 b/docker/Dockerfile.linux.amd64
index 7a2f21f..c961cc7 100644
--- a/docker/Dockerfile.linux.amd64
+++ b/docker/Dockerfile.linux.amd64
@@ -1,4 +1,4 @@
-FROM alpine:3.20
+FROM alpine:3.21
 
 LABEL maintainer="Drone.IO Community <drone-dev@googlegroups.com>" \
   org.label-schema.name="Drone Slack" \
diff --git a/docker/Dockerfile.linux.arm64 b/docker/Dockerfile.linux.arm64
index 4972640..99858d3 100644
--- a/docker/Dockerfile.linux.arm64
+++ b/docker/Dockerfile.linux.arm64
@@ -1,4 +1,4 @@
-FROM alpine:3.20
+FROM alpine:3.21
 
 LABEL maintainer="Drone.IO Community <drone-dev@googlegroups.com>" \
   org.label-schema.name="Drone Slack" \