diff --git a/dockerfiles/alpine/Dockerfile b/dockerfiles/alpine/Dockerfile
index c0bcc80..378f841 100644
--- a/dockerfiles/alpine/Dockerfile
+++ b/dockerfiles/alpine/Dockerfile
@@ -14,6 +14,7 @@ RUN set -e; mkdir /tests; for pkg in $(go list ./...); do \
 	done
 
 FROM ${base_image} AS resource
+RUN apk update && apk upgrade
 RUN apk add --update bash tzdata ca-certificates git
 COPY --from=builder /assets /opt/resource
 
diff --git a/dockerfiles/ubuntu/Dockerfile b/dockerfiles/ubuntu/Dockerfile
index 538ffc1..f97c0a4 100644
--- a/dockerfiles/ubuntu/Dockerfile
+++ b/dockerfiles/ubuntu/Dockerfile
@@ -14,9 +14,10 @@ RUN set -e; mkdir /tests; for pkg in $(go list ./...); do \
 	done
 
 FROM ${base_image} AS resource
-RUN apt-get update \
+RUN apt update && apt upgrade -y -o Dpkg::Options::="--force-confdef"
+RUN apt update \
       && DEBIAN_FRONTEND=noninteractive \
-      apt-get install -y --no-install-recommends \
+      apt install -y --no-install-recommends \
         tzdata \
         ca-certificates \
         git \