diff --git a/Containers/watchtower/Dockerfile b/Containers/watchtower/Dockerfile
index 33e5f6db..076cb0d5 100644
--- a/Containers/watchtower/Dockerfile
+++ b/Containers/watchtower/Dockerfile
@@ -4,7 +4,8 @@ FROM containrrr/watchtower:1.7.1 AS watchtower
 
 FROM alpine:3.20.3
 
-RUN apk upgrade --no-cache -a; \
+RUN set -ex; \
+    apk upgrade --no-cache -a; \
     apk add --no-cache bash
 
 COPY --from=watchtower /watchtower /watchtower
diff --git a/Containers/whiteboard/Dockerfile b/Containers/whiteboard/Dockerfile
index d854f53e..ceec39d7 100644
--- a/Containers/whiteboard/Dockerfile
+++ b/Containers/whiteboard/Dockerfile
@@ -1,6 +1,10 @@
 # syntax=docker/dockerfile:latest
 FROM ghcr.io/nextcloud-releases/whiteboard:v1.0.1
 
+RUN set -ex; \
+    apk upgrade --no-cache -a; \
+    apk add --no-cache bash
+
 COPY --chmod=775 start.sh /start.sh
 
 ENTRYPOINT ["/start.sh"]