diff --git a/examples/misconf/custom-policy/dockerfile/configs/Dockerfile b/examples/misconf/custom-policy/dockerfile/configs/Dockerfile
index aed976af2f92..c48f4bb08e28 100644
--- a/examples/misconf/custom-policy/dockerfile/configs/Dockerfile
+++ b/examples/misconf/custom-policy/dockerfile/configs/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.13
+FROM alpine:3.15
 
 ADD http://example.com/big.tar.xz /usr/src/things/
 RUN tar -xJf /usr/src/things/big.tar.xz -C /usr/src/things