diff --git a/docs/check.Dockerfile b/docs/check.Dockerfile
index d33a46af3b..b36ee6b8c3 100644
--- a/docs/check.Dockerfile
+++ b/docs/check.Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.18 as alpine
+FROM alpine:3.21.0 as alpine
 
 RUN apk --no-cache --no-progress add \
     build-base \