diff --git a/external/testdata/deny/Dockerfile b/external/testdata/deny/Dockerfile
index b3be16e28..76455a6bf 100644
--- a/external/testdata/deny/Dockerfile
+++ b/external/testdata/deny/Dockerfile
@@ -1,3 +1,3 @@
-FROM alpine:3.10
+FROM alpine:3.21.5
 
 ADD foo.txt .
\ No newline at end of file