diff --git a/rootfs/manager/Dockerfile b/rootfs/manager/Dockerfile
index d991b83e3..600d5b8a5 100644
--- a/rootfs/manager/Dockerfile
+++ b/rootfs/manager/Dockerfile
@@ -15,5 +15,11 @@
 FROM alpine:3.3
 RUN apk --update add ca-certificates
 COPY . /
+
+# Install CA certs
+RUN apk add --update-cache ca-certificates
+RUN apk del --purge ca-certificates \
+  && rm -rf /var/cache/apk/*
+
 EXPOSE 8080
 CMD ["/bin/manager", "--kubectl=/bin/kubectl"]
diff --git a/rootfs/resourcifier/Dockerfile b/rootfs/resourcifier/Dockerfile
index a359e7f9a..1757e0fbc 100644
--- a/rootfs/resourcifier/Dockerfile
+++ b/rootfs/resourcifier/Dockerfile
@@ -15,5 +15,11 @@
 FROM alpine:3.3
 RUN apk --update add ca-certificates
 COPY . /
+
+# Install CA certs
+RUN apk add --update-cache ca-certificates
+RUN apk del --purge ca-certificates \
+  && rm -rf /var/cache/apk/*
+
 EXPOSE 8080
 CMD ["/bin/resourcifier", "--kubectl=/bin/kubectl"]