diff --git a/docs/check.Dockerfile b/docs/check.Dockerfile
index 824a970817..eb132d7319 100644
--- a/docs/check.Dockerfile
+++ b/docs/check.Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.20
+FROM alpine:3.21.2
 
 RUN apk --no-cache --no-progress add \
     build-base \