diff --git a/hack/libhack/challenge.sh b/hack/libhack/challenge.sh
index 4d4cd95..0c93027 100644
--- a/hack/libhack/challenge.sh
+++ b/hack/libhack/challenge.sh
@@ -44,7 +44,8 @@ challenge::run() {
         mount_volumes="${mount_baseimage:-} ${mount_challenge}"
     fi
     popd
-    docker run --rm                                          \
+    docker run --init                                        \
+               --rm                                          \
                -p ${CHALLENGE_PORT}:${CHALLENGE_PORT}        \
                ${mount_volumes:-}                            \
                ${@:-}                                        \