diff --git a/tools/releases/dockerfiles/kuma-init.Dockerfile b/tools/releases/dockerfiles/kuma-init.Dockerfile
index 4cfd95c190e2..47b574654d69 100644
--- a/tools/releases/dockerfiles/kuma-init.Dockerfile
+++ b/tools/releases/dockerfiles/kuma-init.Dockerfile
@@ -1,4 +1,4 @@
-FROM gcr.io/k8s-staging-build-image/distroless-iptables:v0.6.6
+FROM gcr.io/k8s-staging-build-image/distroless-iptables:v0.6.6@sha256:be1e8d4d451ada7e39ba4e44fbd8f58ba50feb4f4b1906df7b2bbb424efb06f3
 ARG ARCH
 
 COPY /build/artifacts-linux-$ARCH/kumactl/kumactl /usr/bin