diff --git a/dockerfiles/alpine/Dockerfile b/dockerfiles/alpine/Dockerfile
index 1306b57..4f30967 100644
--- a/dockerfiles/alpine/Dockerfile
+++ b/dockerfiles/alpine/Dockerfile
@@ -16,6 +16,7 @@ RUN set -e; for pkg in $(go list ./...); do \
 	done
 
 FROM ${base_image} AS resource
+RUN apk update && apk upgrade
 RUN apk add --update bash tzdata
 COPY --from=builder /assets /opt/resource
 
diff --git a/dockerfiles/ubuntu/Dockerfile b/dockerfiles/ubuntu/Dockerfile
index 36bfb4f..427e281 100644
--- a/dockerfiles/ubuntu/Dockerfile
+++ b/dockerfiles/ubuntu/Dockerfile
@@ -16,7 +16,8 @@ RUN set -e; for pkg in $(go list ./...); do \
 	done
 
 FROM ${base_image} AS resource
-RUN apt-get update && apt-get install -y --no-install-recommends tzdata \
+RUN apt update && apt upgrade -y -o Dpkg::Options::="--force-confdef"
+RUN apt update && apt install -y --no-install-recommends tzdata \
     && rm -rf /var/lib/apt/lists/*
 COPY --from=builder /assets /opt/resource