diff --git a/scripts/kernels/Dockerfile.deb b/scripts/kernels/Dockerfile.deb
index 9652d1daf..4b796ebee 100644
--- a/scripts/kernels/Dockerfile.deb
+++ b/scripts/kernels/Dockerfile.deb
@@ -1,4 +1,4 @@
-FROM alpine:3.5 AS extract
+FROM alpine:3.7 AS extract
 
 ARG DEB_URLS
 
@@ -20,7 +20,7 @@ RUN cp -a boot/System.map-* /out/System.map
 RUN tar cf /out/kernel.tar lib
 RUN tar cf /out/kernel-dev.tar usr || true
 
-FROM linuxkit/toybox-media:b396a375852e5dffc002389d95e0658c8de72914@sha256:a317cc378946ee48cc011cdfc5aa08f0229f5bf10ff70e3690d8f60b36700033
+FROM scratch
 WORKDIR /
 ENTRYPOINT []
 CMD []
diff --git a/scripts/kernels/Dockerfile.rpm b/scripts/kernels/Dockerfile.rpm
index 332a90996..819117265 100644
--- a/scripts/kernels/Dockerfile.rpm
+++ b/scripts/kernels/Dockerfile.rpm
@@ -1,4 +1,4 @@
-FROM alpine:3.5 AS extract
+FROM alpine:3.7 AS extract
 
 ARG RPM_URLS
 
@@ -21,7 +21,7 @@ RUN cp -a boot/System.map-* /out/System.map || mv lib/modules/*/System.map /out/
 RUN tar cf /out/kernel.tar lib
 RUN tar cf /out/kernel-dev.tar usr || true
 
-FROM linuxkit/toybox-media:b396a375852e5dffc002389d95e0658c8de72914@sha256:a317cc378946ee48cc011cdfc5aa08f0229f5bf10ff70e3690d8f60b36700033
+FROM scratch
 WORKDIR /
 ENTRYPOINT []
 CMD []